Columbus Crew's Jairo Arrieta (25) protects the ball from Philadelphia Union's Keon Daniel during the second half of an MLS soccer game in Columbus, Ohio, Saturday, April 6, 2013. The game ended in a 1-1 tie. (AP Photo/Mike Munden)

FILE - In this June 2, 2005, file photom soccer star David Beckham poses with kids from the Los Angeles area during a field skills demonstration following a news conference in Carson, Calif. The 38-year-old midfielder, who recently won a league title in a fourth country with Paris Saint-Germain, said Thursday, May 16, 2013, he will retire after the season. (AP Photo/Stefano Paltera, File)

Montreal Impact's Andrs Romero, right, and Vancouver Whitecaps' Nigel Reo-Coker go for the ball during first-half, first-leg action of the Canadian Championship soccer final in Montreal, Wednesday, May 15, 2013. (AP Photo/The Canadian Press, Graham Hughes)

Montreal Impact's Andrew Wenger, right, and Vancouver Whitecaps' Jordan Harvey go up for the ball during first-half, first-leg action of the Canadian Championship soccer final in Montreal, Wednesday, May 15, 2013. (AP Photo/The Canadian Press, Graham Hughes)

Montreal Impact's Patrice Bernier, right, and Vancouver Whitecaps' Brad Rusin go up for the ball during first-half, first-leg action of the Canadian Championship soccer final in Montreal, Wednesday, May 15, 2013. (AP Photo/The Canadian Press, Graham Hughes)

Montreal Impact's Andrs Romero, right, and Vancouver Whitecaps' Nigel Reo-Coker battle for the ball during first-half, first-leg action of the Canadian Championship soccer final in Montreal, Wednesday, May 15, 2013. (AP Photo/The Canadian Press, Graham Hughes)

San Jose Earthquakes' Marvin Chavez (81) moves the ball against FC Dallas during the first half of an MLS soccer game Wednesday, July 18, 2012, in Santa Clara, Calif. (AP Photo/Ben Margot)

Houston Dynamo's Will Bruin (12) and Sporting Kansas City's Aurelien Collin (78) tie up during first half of a MLS soccer playoff game Wednesday, Nov. 7, 2012, in Kansas City, Kan. Sporting KC won the game 1-0 but lost the playoffs 2-1 in aggregate scoring. (AP Photo/Ed Zurga)

Portland Timbers fans hold up a multitude of different colored pieces of cloth and a banner sign as a display against homophobia before their MLS soccer game against Chivas USA in Portland, Ore., Sunday, May 12, 2013.(AP Photo/Don Ryan)

Portland Timbers fans show banner signs as a display against homophobia before their MLS soccer game against Chivas USA in Portland, Ore., Sunday, May 12, 2013.(AP Photo/Don Ryan)

Portland Timbers midfielder Will Johnson celebrates after scoring a goal in penalty time at an MLS soccer game against Chivas USA in Portland, Ore., Sunday, May 12, 2013. The Timbers won 3-0. (AP Photo/Don Ryan)

Portland Timbers defender Andrew Jean-Baptiste, left, goes high over Chivas USA forward Tristan Bowen to head the ball during the first half of an MLS soccer game in Portland, Ore., Sunday, May 12, 2013. (AP Photo/Don Ryan)

Seattle Sounders' Zach Scott, right, defends as San Jose Earthquakes' Alan Gordon, left, attempts a shot in the first half of an MLS soccer match, Saturday, May 11, 2013, in Seattle. (AP Photo/Ted S. Warren)

Seattle Sounders' Zach Scott, right, moves in to defend as San Jose Earthquakes' Alan Gordon (24) attempts a shot in the first half of an MLS soccer match, Saturday, May 11, 2013, in Seattle. (AP Photo/Ted S. Warren)

Seattle Sounders' Eddie Johnson, left, leaps as San Jose Earthquakes goalkeeper Jon Busch makes a stop in the first half of an MLS soccer match, Saturday, May 11, 2013, in Seattle. (AP Photo/Ted S. Warren)

Philadelphia Union forward Jack McInerney, right, chases after the ball against D.C. United defender Chris Korb, left, during the first half of an MLS soccer game on Sunday, April 21, 2013, in Washington. (AP Photo/Nick Wass)

Queens Park Rangers' Tal Ben Haim, right watches the ball as he attempts to block Arsenal's Santi Cazorla during their English Premier league soccer match at Rangers' Loftus road stadium in London, Saturday, May 4, 2013. (AP Photo/Alastair Grant)

Houston Dynamo's Will Bruin, left, kicks the ball as D.C. United's Emiliano Dudar (19) defends during the second half of the second game of an MLS soccer Eastern Conference final playoff series, Sunday, Nov. 18, 2012, in Washington. The Dynamo advanced to their second straight MLS Cup final and fourth in seven years, tying D.C. United 1-1 Sunday for a 4-2 aggregate win in the Eastern Conference final. (AP Photo/Luis M. Alvarez)

Sporting KC goalkeeper Jimmy Nielsen, middle, is congratulated by teammates Matt Besler, left, and Chance Myers (7) following the championship US Open Cup soccer match in Kansas City, Kan., Wednesday, Aug. 8, 2012. Sporting Kansas City beat the Seattle Sounders 3-2 in penalty kicks after a 1-1 draw. (AP Photo/Orlin Wagner)

Real Salt Lake midfielder Javier Morales (11) controls the ball under pressure from Vancouver Whitecaps FC midfielder Nigel Reo-Coker (13) during an MLS soccer match Saturday, May 4, 2013, in Sandy, Utah. (AP Photo/The Salt Lake Tribune, Kim Raff)

Real Salt Lake defender Tony Beltran (2) and Vancouver Whitecaps FC midfielder Russell Teibert (31) compete for the ball during an MLS soccer match Saturday, May 4, 2013, in Sandy, Utah. (AP Photo/The Salt Lake Tribune, Kim Raff)

Vancouver Whitecaps FC midfielder Russell Teibert (31) and Real Salt Lake midfielder Kyle Beckerman (5) compete for the ball during an MLS soccer match Saturday, May 4, 2013, in Sandy, Utah. (AP Photo/The Salt Lake Tribune, Kim Raff)

Real Salt Lake midfielder Javier Morales (11) gets tripped by Vancouver Whitecaps midfielder Gershon Koffie (28) during an MLS soccer match Saturday, May 4, 2013, in Sandy, Utah. (AP Photo/The Salt Lake Tribune, Kim Raff)

Real Salt Lake midfielder Javier Morales (11) gets tripped by Vancouver Whitecaps FC midfielder Gershon Koffie (28) during an MLS soccer match Saturday, May 4, 2013, in Sandy, Utah. (AP Photo/The Salt Lake Tribune, Kim Raff)

Real Salt Lake forward Joao Plata (8) controls the ball against Vancouver Whitecaps FC defender Andy O'Brien (40) during an MLS soccer match Saturday, May 4, 2013, in Sandy, Utah. (AP Photo/The Salt Lake Tribune, Kim Raff)

Real Salt Lake midfielder Javier Morales, right, tries to maintain control as Vancouver Whitecaps' Andy O'Brien (40) defends during an MLS soccer match Saturday, May 4, 2013, in Sandy, Utah. (AP Photo/The Salt Lake Tribune, Kim Raff)

Seattle Sounders' Mauro Rosales, left, dribbles the ball in the second half of an MLS soccer match against the New England Revolution, Saturday, April 13, 2013, in Seattle. (AP Photo/Ted S. Warren)

Former player Mikael Silvestre, left, trains with Manchester United's Alexander Buttner, right, and Darren Fletcher as the team train at Carrington training ground, in Manchester, Monday, Oct. 1, 2012. Manchester United will play CFR Cluj-Napoca in a Champion's League group H soccer match on Tuesday. (AP Photo/Jon Super)

Portland Timbers fans display a banner sign supporting the people of Boston in the wake of the Boston Marathon bombing during the first half of an MLS soccer match against the New England Revolution in Portland, Ore., Thursday, May 2, 2013.(AP Photo/Don Ryan)

Portland Timbers forward Rodney Wallace, top, leaps over New England Revolution goalie Donovan Ricketts as Ricketts traps the ball during the first half of an MLS soccer match in Portland, Ore., Thursday, May 2, 2013.(AP Photo/Don Ryan)

New England Revolution midfielder Kalifa Cisse, left, slides in to steal the ball from Portland Timbers forward Rodney Wallace during the first half of an MLS soccer match in Portland, Ore., Thursday, May 2, 2013.(AP Photo/Don Ryan)

Portland Timbers forward Ryan Johnson, left, heads the ball toward the goal on a corner kick over New England Revolution forward Jerry Bengtson during the first half of an MLS soccer game in Portland, Ore., Thursday, May 2, 2013. (AP Photo/Don Ryan)

New England Revolution goalie Donovan Ricketts is checked over by a teammate after a collision with a Portland Timbers player during the first half of an MLS soccer match in Portland, Ore., Thursday, May 2, 2013. (AP Photo/Don Ryan)

New England Revolution midfielder Ryan Guy, right, and Portland Timbers midfielder Diego Valeri battle for the ball during the first half of an MLS soccer match in Portland, Ore., Thursday, May 2, 2013. (AP Photo/Don Ryan)

Montreal Impact's Andres Romero, right, tackles Toronto FC's Ryan Richter during the first half in the second leg of a semifinal in the Canadian Championship soccer tournament in Montreal, Wednesday, May 1, 2013. (AP Photo/The Canadian Press, Graham Hughes)

Montreal Impact's Marco Di Vaio, left, breaks away from Toronto FC's Doneil Henry during the fsecond half in the second leg of a semifinal in the Canadian Championship soccer tournament in Montreal, Wednesday, May 1, 2013. (AP Photo/The Canadian Press, Graham Hughes)

Montreal Impact's Justin Mapp, left, breaks away from Toronto FC's Doneil Henry, center, and Jeremy Hall during the second half of their second-leg semifinal Amway Canadian Championship soccer match, Wednesday, May 1, 2013, in Montreal. (AP Photo/The Canadian Press, Graham Hughes)

Montreal Impact's Andres Romero, right, beats Toronto FC goalkeeper Stefan Frei to score during the second half of their second-leg semifinal Amway Canadian Championship soccer match, Wednesday, May 1, 2013, in Montreal. (AP Photo/The Canadian Press, Graham Hughes)

Montreal Impact's Andres Romero celebrates after scoring against Toronto FC during the second half of their second-leg semifinal Amway Canadian Championship soccer match, Wednesday, May 1, 2013, in Montreal. (AP Photo/The Canadian Press, Graham Hughes)

Montreal Impact's Andrew Wenger, left, tackles Toronto FC's Ryan Richter during the first half of their second-leg semifinal Amway Canadian Championship soccer match, Wednesday, May 1, 2013, in Montreal. (AP Photo/The Canadian Press, Graham Hughes)

Montreal Impact's Justin Mapp, left, celebrates with Davy Arnaud, center, and Maxim Tissot after scoring against Toronto FC during the first half of their second-leg semifinal Amway Canadian Championship soccer match, Wednesday, May 1, 2013, in Montreal. (AP Photo/The Canadian Press, Graham Hughes)

Montreal Impact's Daniele Paponi, left, celebrates after scoring against Toronto FC as Doneil Henry looks on during the first half of their second-leg semifinal Amway Canadian Championship soccer match, Wednesday, May 1, 2013, in Montreal. (AP Photo/The Canadian Press, Graham Hughes)

Vancouver Whitecaps' Tom Heinemann (29) and FC Edmonton's Antonio Rago (24) head the ball during the first half of their second-leg semifinal Amway Canadian Championship soccer match, Wednesday, May 1, 2013, in Vancouver, British Columbia. (AP Photo/The Canadian Press, Justin Tang)

Vancouver Whitecaps' Russell Teibert (31) battles for possession with FC Edmonton's Chris Nurse (7) during the first half of their second-leg semifinal Amway Canadian Championship soccer match, Wednesday, May 1, 2013, in Vancouver, British Columbia. (AP Photo/The Canadian Press, Justin Tang)

Vancouver Whitecaps' Corey Hertzog (26) celebrates his goal over FC Edmonton during the second half of their second-leg semifinal Amway Canadian Championship soccer match, Wednesday, May 1, 2013, in Vancouver, British Columbia. (AP Photo/The Canadian Press, Justin Tang)

FC Edmonton's Adrian LeRoy (20) reacts after receiving a red card for colliding with Vancouver Whitecaps' Corey Hertzog, in white, during the second half of the second leg of the Canadian Championship soccer semifinal in Vancouver, British Columbia, on Wednesday, May 1, 2013. (AP Photo/The Canadian Press, Justin Tang)

FC Edmonton's Neil Hlavaty (4) fights for possession of the ball with Vancouver Whitecaps' Darren Mattocks (11) during the first half of their second-leg semifinal Amway Canadian Championship soccer match, Wednesday, May 1, 2013, in Vancouver, British Columbia. (AP Photo/The Canadian Press, Justin Tang)

Vancouver Whitecaps' Camilo Sanvezzo (7) challenges FC Edmonton's Edison Edward (3) for possession during the first half of their second-leg semifinal Amway Canadian Championship soccer match, Wednesday, May 1, 2013, in Vancouver, British Columbia. (AP Photo/The Canadian Press, Justin Tang)

Portland Timbers defender Ryan Kawulok, left, is mobbed by members of the Green Machine soccer team as they play in Portland, Ore., Wednesday, May 1, 2013. The Timbers and Make-A-Wish Oregon treated the Green Machine and one of their players, Atticus Lane-Dupre, to a game at Jeld-Wen Field with more than 3,000 fans coming out to lend their support. Atticus missed the Green Machine's final match last fall because of cancer treatment. (AP Photo/Don Ryan)

The Green Machine soccer team and the MLS Portland Timbers team play a game in Portland, Ore., Wednesday, May 1, 2013. The Timbers and Make-A-Wish Oregon treated the Green Machine and one of their players, eight-year-old Atticus Lane-Dupre, to a game at Jeld-Wen Field, with more than 3,000 fans coming out to lend their support. Atticus missed the Green Machine's final match last fall because of cancer treatment. (AP Photo/Don Ryan)

Atticus Lane-Dupre, 8, shoots for the winning goal as his team, the Green Machine, plays against the MLS Portland Timbers soccer team in Portland, Ore., Wednesday, May 1, 2013. The Timbers and Make-A-Wish Oregon treated Atticus' team to a game at Jeld-Wen Field with more than 3,000 fans coming out to lend their support. Atticus missed the Green Machine's final match last fall because of cancer treatment. (AP Photo/Don Ryan)

Atticus Lane-Dupre, center huddle, and his soccer team, The Green Machine, celebrate while playing the Portland Timbers soccer team in Portland, Ore., Wednesday, May 1, 2013. The Timbers and Make-A-Wish Oregon treated Atticus' team to a game at Jeld-Wen Field with more than 3,000 fans coming out to lend their support. Atticus missed the Green Machine's final match last fall because of cancer treatment. (AP Photo/The Oregonian, Bruce Ely)

Atticus Lane Dupre, 8, third from left, is congratulated by his teammates on the Green Machine soccer team after scoring the winning goal against the MLS Portland Timbers soccer team in Portland, Ore., Wednesday, May 1, 2013. The Timbers and Make-A-Wish Oregon treated Atticus' team to a game at Jeld-Wen Field with more than 3,000 fans coming out to lend their support. Atticus missed the Green Machine's final match last fall because of cancer treatment. (AP Photo/Don Ryan)

Atticus Lane-Dupre, 8, center, and his soccer team, The Green Machine, play the Portland Timbers soccer team in Portland, Ore., Wednesday, May 1, 2013. The Timbers and Make-A-Wish Oregon treated Atticus' team to a game at Jeld-Wen Field with more than 3,000 fans coming out to lend their support. Atticus missed the Green Machine's final match last fall because of cancer treatment. (AP Photo/The Oregonian, Bruce Ely)

Atticus Lane-Dupre, 8, celebrates after scoring a goal as his team, the Green Machine, play against the MLS Portland Timbers soccer team in Portland, Ore., Wednesday, May 1, 2013. The Timbers and Make-A-Wish Oregon treated Atticus' team to a game at Jeld-Wen Field with more than 3,000 fans coming out to lend their support. Atticus missed the Green Machine's final match last fall because of cancer treatment. (AP Photo/Don Ryan)

Atticus Lane Dupre, 8, shoots for the winning goal as his team, the Green Machine, plays against the MLS Portland Timbers soccer team in Portland, Ore., Wednesday, May 1, 2013. The Timbers and Make-A-Wish Oregon treated Atticus' team to a game at Jeld-Wen Field with more than 3,000 fans coming out to lend their support. Atticus missed the Green Machine's final match last fall because of cancer treatment. (AP Photo/Don Ryan)

Atticus Lane-Dupre, 8, poses for a team photo with his soccer team, the Green Machine, before playing the MLS Portland Timbers soccer team in Portland, Ore., Wednesday, May 1, 2013. The Timbers and Make-A-Wish Oregon treated Atticus' team to a game at Jeld-Wen Field with more than 3,000 fans coming out to lend their support. Atticus missed the Green Machine's final match last fall because of cancer treatment. (AP Photo/Don Ryan)

Portland Timbers defender Ryan Kawulok, left, is mobbed by members of the Green Machine soccer team as they play in Portland, Ore., Wednesday, May 1, 2013. The Timbers and Make-A-Wish Oregon treated the Green Machine and one of their players, Atticus Lane Dupre, to a game at Jeld-Wen Field with more than 3,000 fans coming out to lend their support. Atticus missed the Green Machine's final match last fall because of cancer treatment. (AP Photo/Don Ryan)

Atticus Lane Dupre, 8, celebrates after scoring a goal as his team, the Green Machine, play against the MLS Portland Timbers soccer team in Portland, Ore., Wednesday, May 1, 2013. The Timbers and Make-A-Wish Oregon treated Atticus' team to a game at Jeld-Wen Field with more than 3,000 fans coming out to lend their support. Atticus missed the Green Machine's final match last fall because of cancer treatment. (AP Photo/Don Ryan)

Atticus Lane-Dupre, 8, third from left, is congratulated by his teammates on the Green Machine soccer team after scoring the winning goal against the MLS Portland Timbers soccer team in Portland, Ore., Wednesday, May 1, 2013. The Timbers and Make-A-Wish Oregon treated Atticus' team to a game at Jeld-Wen Field with more than 3,000 fans coming out to lend their support. Atticus missed the Green Machine's final match last fall because of cancer treatment. (AP Photo/Don Ryan)

Atticus Lane-Dupre, 8, heads to the goal as his soccer team, The Green Machine, plays the Portland Timbers soccer team in Portland, Ore., Wednesday, May 1, 2013. The Timbers and Make-A-Wish Oregon treated Atticus' team to a game at Jeld-Wen Field with more than 3,000 fans coming out to lend their support. Atticus missed the Green Machine's final match last fall because of cancer treatment. (AP Photo/The Oregonian, Bruce Ely)

Atticus Lane-Dupre, 8, middle, and his soccer team, The Green Machine play against the Portland Timbers soccer team in Portland, Ore., Wednesday, May 1, 2013. The Timbers and Make-A-Wish Oregon treated Atticus' team to a game at Jeld-Wen Field with more than 3,000 fans coming out to lend their support. Atticus missed the Green Machine's final match last fall because of cancer treatment. (AP Photo/The Oregonian, Bruce Ely)

San Jose Earthquakes' Steven Lenhart leaves the field after the Earthquakes defeated the Seattle Sounders 2-1 in a MLS soccer match, Saturday, Sept. 22, 2012, in Seattle. (AP Photo/Ted S. Warren)

New England Revolution's Chris Tierney, right, battles for the ball with Seattle Sounders' Alex Caskey, left, in the second half of an MLS soccer match on Saturday, April 13, 2013, in Seattle. The Sounders and the Revolution tied 0-0. (AP Photo/Ted S. Warren)

Colorado Rapids defender Drew Moor, left, is called for a foul as he defends Houston Dynamo midfielder Brad Davis during the first half of a MLS soccer game, Sunday, April 28, 2013, in BBVA Compass Stadium in Houston. ( AP Photo/Houston Chronicle, Nick de la Torre)

Houston Dynamo defender Jermaine Taylor, left, pulls in the ball as Portland Timbers forward Ryan Johnson challenges during the first half of an MLS soccer game in Portland, Ore., Saturday, April 6, 2013.(AP Photo/Don Ryan)

Los Angeles Galaxy head coach Bruce Arena reaches for his goalie Brian Rowe, right following their MLS soccer game against Real Salt Lake Saturday, April 27, 2013, Sandy, Utah. The Galaxy defeated Real Salt Lake 2-0. (AP Photo/Rick Bowmer)

Los Angeles Galaxy forward Charlie Rugg, left, battles with Real Salt Lake defender Chris Schuler (28) during the first half of an MLS soccer game Saturday, April 27, 2013, Sandy, Utah. (AP Photo/Rick Bowmer)

Real Salt Lake forward Olmes Garcia, left, and Los Angeles Galaxy defender Sean Franklin (5) battle for a ball during the first half of an MLS soccer game Saturday, April 27, 2013, Sandy, Utah. (AP Photo/Rick Bowmer)

Los Angeles Galaxy midfielder Marcelo Sarvas (8) defends against Real Salt Lake midfielder Ned Grabavoy (20) during the first half of an MLS soccer game Saturday, April 27, 2013, Sandy, Utah. (AP Photo/Rick Bowmer)

Real Salt Lake midfielder Kyle Beckerman (5) defends against Los Angeles Galaxy forward Charlie Rugg, left, during the first half of an MLS soccer game Saturday, April 27, 2013, Sandy, Utah. (AP Photo/Rick Bowmer)

Sporting KC forward C.J. Sapong (17) heads the ball over Portland Timbers midfielder Will Johnson, left, during the first half of an MLS soccer match in Kansas City, Kan., Saturday, April 27, 2013. (AP Photo/Orlin Wagner)

Sporting KC goalkeeper Jimmy Nielsen, right, blocks a kick by Portland Timbers forward Ryan Johnson, left, during the first half of an MLS soccer match in Kansas City, Kan., Saturday, April 27, 2013. (AP Photo/Orlin Wagner)

Sporting KC defender Chance Myers (7) heads the ball past Portland Timbers defenders for a goal during the first half of an MLS soccer match in Kansas City, Kan., Saturday, April 27, 2013. (AP Photo/Orlin Wagner)

Portland Timbers midfielder Diego Valeri (8) kicks past Sporting KC midfielder Paulo Nagamura (6) during the first half of an MLS soccer match in Kansas City, Kan., Saturday, April 27, 2013. The kick hit the crossbar. (AP Photo/Orlin Wagner)

Vancouver Whitecaps goalkeeper Joe Cannon, left, punches the ball away from FC Dallas' David Ferreira, right, of Colombia, as Whitecaps' Alain Rochat, back, defends during the first half of an MLS soccer game in Vancouver, British Columbia on Saturday April 27, 2013. (AP Photo/The Canadian Press, Darryl Dyck)

Vancouver Whitecaps' Young-Pyo Lee, of South Korea, gets his head on the ball while under pressure from FC Dallas' Blas Perez, back, of Panama, during the first half of an MLS soccer game in Vancouver, British Columbia on Saturday April 27, 2013. (AP Photo/The Canadian Press, Darryl Dyck)

Vancouver Whitecaps' Camilo Sanvezzo, left, of Brazil, and Tom Heinemann celebrate after Sanvezzo scored the tying goal against FC Dallas during the second half of an MLS soccer game in Vancouver, British Columbia, Saturday, April 27, 2013. (AP Photo/The Canadian Press, Darryl Dyck)

FC Dallas' Andrew Jacobson shakes water off his face during the first half of an MLS soccer game against the Vancouver Whitecaps in Vancouver, British Columbia, Saturday, April 27, 2013. (AP Photo/The Canadian Press, Darryl Dyck)

Vancouver Whitecaps' Camilo Sanvezzo, of Brazil, celebrates after scoring the tying goal against FC Dallas during the second half of an MLS soccer game in Vancouver, British Columbia, Saturday, April 27, 2013. (AP Photo/The Canadian Press, Darryl Dyck)

Vancouver Whitecaps goalkeeper Joe Cannon, left, punches the ball away from FC Dallas' David Ferreira, right, of Colombia, as Whitecaps' Alain Rochat, back, defends during the first half of an MLS soccer game in Vancouver, British Columbia on Saturday April 27, 2013. (AP Photo/The Canadian Press, Darryl Dyck)

FC Dallas' George John, center, celebrates a goal by teammate Kenny Cooper, 33, as Vancouver Whitecaps' Andy O'Brien, of England, from left, goalkeeper Joe Cannon, Brad Rusin, Young-Pyo Lee, second right, of South Korea, and FC Dallas' Andrew Jacobson, right, look on during the first half of an MLS soccer game in Vancouver, British Columbia on Saturday April 27, 2013. (AP Photo/The Canadian Press, Darryl Dyck)

Vancouver Whitecaps' Darren Mattocks, left, of Jamaica, heads the ball away from FC Dallas' George John during the first half of an MLS soccer game in Vancouver, British Columbia on Saturday April 27, 2013. (AP Photo/The Canadian Press, Darryl Dyck)

New York Red Bulls' Tim Cahill, center, heads the ball for his team's winning goal above Toronto FC 's Ashtone Morgan during the second half of an MLS soccer game in Toronto on Saturday, April 27, 2013. The Red Bulls on 2-1. (AP Photo/The Canadian Press, Chris Young)

Toronto FC 's Darren O'Dea tackles New York Red Bulls' Lloyd Sam during the first half of an MLS soccer game in Toronto on Saturday, April 27, 2013. (AP Photo/The Canadian Press, Chris Young)

New York Red Bulls' Tim Cahill, left, celebrates with Kosuke Kimura, right, after scoring his team's winning goal against Toronto FC during the second half of an MLS soccer game in Toronto on Saturday, April 27, 2013. (AP Photo/The Canadian Press, Chris Young)

New York Red Bulls' Tim Cahill, center, tries to take the ball between Toronto FC 's John Bostock, left, and Darren O'Dea during second half MLS action in Toronto on Saturday April 27, 2013.(AP Photo/The Canadian Press, Chris Young)

New York Red Bulls' Tim Cahill, right, heads the ball for his team's winning goal above Toronto FC 's Ashtone Morgan during the second half of an MLS soccer game in Toronto on Saturday, April 27, 2013. (AP Photo/The Canadian Press, Chris Young)

Toronto FC 's Darren O'Dea, right, battles for the ball with New York Red Bulls Fabian Espindola during first half MLS action in Toronto on Saturday April 27, 2013. (AP Photo/The Canadian Press, Chris Young)

New York Red Bulls' Tim Cahill, right, heads the ball for his team's winning goal above Toronto FC 's Ashtone Morgan during the second half of an MLS soccer game in Toronto on Saturday, April 27, 2013. (AP Photo/The Canadian Press, Chris Young)

Montreal Impact's Daniele Paponi, right, tackles Chicago Fire's Jalil Anibaba during first half MLS soccer action in Montreal, Saturday, April 27, 2013. (AP Photo/The Canadian Press, Graham Hughes)

Montreal Impact's Felipe Martins, left, breaks away from Chicago Fire's Patrick Nyarko during first half MLS soccer action in Montreal, Saturday, April 27, 2013. (AP Photo/The Canadian Press, Graham Hughes)

Montreal Impact's Daniele Paponi, right, tackles Chicago Fire's Jalil Anibaba during first half MLS soccer action in Montreal, Saturday, April 27, 2013. (AP Photo/The Canadian Press, Graham Hughes)

Montreal Impact's Davy Arnaud, right, tackles Chicago Fire's Jeff Larentowicz during first half MLS soccer action in Montreal, Saturday, April 27, 2013. (AP Photo/The Canadian Press, Graham Hughes)

Major League Soccer commissioner Don Garber addresses the Montreal Board of Trade, Wednesday, Feb. 15, 2012 in Montreal. (AP Photo/The Canadian Press, Ryan Remiorz)

Toronto FC goalie Stefan Frei, left, leaps in as Danny Califf, right, battles for the ball with Montreal Impact's Hassoum Camara during the second half of their Amway Canadian Championship qualifying soccer match, Wednesday, April 24, 2013, in Toronto. The tournament winner will represent Canada in the CONCACAF Champions League. (AP Photo/The Canadian Press, Frank Gunn)

Montreal Impact goalie Evan Bush makes a save as Jeb Brousky (5) takes out Toronto FC's Jon Osorio, rear, during the first half of their Amway Canadian Championship qualifying soccer match, Wednesday, April 24, 2013, in Toronto. The tournament winner will represent Canada in the CONCACAF Champions League. (AP Photo/The Canadian Press, Frank Gunn)

Los Angeles Galaxy midfielder Landon Donovan controls the ball during the second half of the CONCACAF Champions League semifinal against Monterrey, Wednesday, April 3, 2013, in Carson, Calif. Monterrey won 2-1. (AP Photo/Bret Hartman)

From left, San Jose Earthquakes' Mike Fucito, New York Red Bulls' Juninho (9), and Earthquakes' Justin Morrow (15) chase a loose ball during the first half of an MLS soccer game Sunday, March 10, 2013, in Santa Clara, Calif. (AP Photo/Ben Margot)