New York Yankees relief pitcher David Robertson delivers in the ninth inning against the Tampa Bay Rays in their baseball game at Yankee Stadium in New York, Wednesday, May 9, 2012. Robertson, who is replacing injured Yankees closer Mariano Rivera, loaded the bases in the ninth and then gave up a three-run home run to Rays' Matt Joyce. The Rays won 4-1.

New York Yankees closer Mariano Rivera, who suffered a season-ending leg injury shagging fly balls in the outfield before the Yankees' game against Kansas City last week, speaks to the media before the Yankees baseball game at Yankee Stadium in New York, Wednesday, May 9, 2012.

New York Yankees closer Mariano Rivera, who suffered a season-ending knee injury shagging fly balls in the outfield before the Yankees' baseball game against the Kansas City Royals last week, speaks to reporters in New York, Wednesday, May 9, 2012.

New York Yankees closer Mariano Rivera, who suffered a season-ending leg injury shagging fly balls in the outfield before the Yankees' baseball game against Kansas City last week, speaks to reporters before the Yankees' game against the Tampa Bay Rays in New York, Wednesday, May 9, 2012.

New York Yankees closer Mariano Rivera, who suffered a season-ending leg injury shagging fly balls in the outfield before the Yankees' baseball game against Kansas City last week, leaves a news conference after speaking to reporters before the Yankees' game against the Tampa Bay Rays in New York, Wednesday, May 9, 2012.

New York Yankees closer Mariano Rivera, who suffered a season-ending leg injury shagging fly balls in the outfield before the Yankees' baseball game against Kansas City last week, speaks to reporters before the Yankees' game against the Tampa Bay Rays in New York, Wednesday, May 9, 2012.

New York Yankees closer Mariano Rivera, who suffered a season-ending leg injury shagging fly balls in the outfield before the Yankees' baseball game against Kansas City last week, speaks to reporters before the Yankees' game against the Tampa Bay Rays in New York, Wednesday, May 9, 2012.

New York Yankees closer Mariano Rivera, who suffered a season-ending leg injury shagging fly balls in the outfield before the Yankees' baseball game against Kansas City last week, leaves a news conference after speaking to reporters before the Yankees' game against the Tampa Bay Rays in New York, Wednesday, May 9, 2012.

New York Yankees closer Mariano Rivera, who suffered a season-ending leg injury shagging fly balls in the outfield before the Yankees' baseball game against Kansas City last week, speaks to reporters before the Yankees' game against the Tampa Bay Rays in New York, Wednesday, May 9, 2012.

New York Yankees closer Mariano Rivera, who suffered a season-ending leg injury shagging fly balls in the outfield before the Yankees' baseball game against Kansas City last week, leaves a news conference on crutches before the Yankees' game against the Tampa Bay Rays in New York, Wednesday, May 9, 2012.

New York Yankees closer Mariano Rivera leaves a news conference on crutches after addressing the media before the Yankees baseball game against the Tampa Bay Rays at Yankee Stadium, Wednesday, May 9, 2012, in New York. Rivera suffered a season-ending leg injury shagging fly balls in the outfield before the Yankees game against Kansas City last week in Kansas City, Mo.

KANSAS CITY, MO - MAY 4: Mariano Rivera #42 of the New York Yankees stands on crutches while being interviewed outside of team's clubhouse at Kauffman Stadium May 4, 2012 in Kansas City, Missouri. Rivera tore an ACL while shagging balls during batting practice before a game against the Kansas City Royals on May 3. (Photo by Ed Zurga/Getty Images)

KANSAS CITY, MO - MAY 4: Mariano Rivera #42 of the New York Yankees is interviewed outside of team's clubhouse at Kauffman Stadium May 4, 2012 in Kansas City, Missouri. Rivera tore an ACL while shagging balls during batting practice before a game against the Kansas City Royals on May 3. (Photo by Ed Zurga/Getty Images)

KANSAS CITY, MO - MAY 4: Mariano Rivera #42 of the New York Yankees is interviewed outside of team's clubhouse at Kauffman Stadium May 4, 2012 in Kansas City, Missouri. Rivera tore an ACL while shagging balls during batting practice before a game against the Kansas City Royals on May 3. (Photo by Ed Zurga/Getty Images)

KANSAS CITY, MO - MAY 4: Mariano Rivera #42 of the New York Yankees walks backs into the team's clubhouse after a press conference at Kauffman Stadium May 4, 2012 in Kansas City, Missouri. Rivera tore an ACL while shagging balls during batting practice before a game against the Kansas City Royals on Thursday.(Photo by Ed Zurga/Getty Images)

KANSAS CITY, MO - MAY 4: Mariano Rivera #42 of the New York Yankees is interviewed outside of team's clubhouse at Kauffman Stadium May 4, 2012 in Kansas City, Missouri. Rivera tore an ACL while shagging balls during batting practice before a game against the Kansas City Royals on May 3. (Photo by Ed Zurga/Getty Images)

KANSAS CITY, MO - MAY 4: Mariano Rivera #42 of the New York Yankees is interviewed outside of team's clubhouse at Kauffman Stadium May 4, 2012 in Kansas City, Missouri. Rivera tore an ACL while shagging balls during batting practice before a game against the Kansas City Royals on May 3. (Photo by Ed Zurga/Getty Images)

KANSAS CITY, MO - MAY 4: Mariano Rivera #42 of the New York Yankees is interviewed outside of team's clubhouse at Kauffman Stadium May 4, 2012 in Kansas City, Missouri. Rivera tore an ACL while shagging balls during batting practice before a game against the Kansas City Royals on May 3. (Photo by Ed Zurga/Getty Images)

KANSAS CITY, MO - MAY 4: Mariano Rivera #42 of the New York Yankees walks backs into the team's clubhouse after a press conference at Kauffman Stadium May 4, 2012 in Kansas City, Missouri. Rivera tore an ACL while shagging balls during batting practice before a game against the Kansas City Royals on Thursday.(Photo by Ed Zurga/Getty Images)

NEW YORK - FILE: Mariano Rivera #42 of the New York Yankees pitches against the Los Angeles Angels of Anaheim at Yankee Stadium on July 21, 2010 in the Bronx borough of New York City. According to reports, Rivera suffered a tear to his anterior cruciate ligament (ACL) in his right knee as well as a partially torn meniscus while shagging balls in the outfield during batting pratice on May 3, 2012 at Kauffman Stadium in Kansas City, Missouri. (Photo by Nick Laham/Getty Images)

NEW YORK - FILE: Mariano Rivera #42 of the New York Yankees delivers a pitch against the New York Mets on June 20, 2010 at Yankee Stadium in the Bronx borough of New York City. According to reports, Rivera suffered a tear to his anterior cruciate ligament (ACL) in his right knee as well as a partially torn meniscus while shagging balls in the outfield during batting pratice on May 3, 2012 at Kauffman Stadium in Kansas City, Missouri. (Photo by Jim McIsaac/Getty Images)

NEW YORK - FILE: Derek Jeter #2, Mariano Rivera #42 and Robinson Cano #24 of the New York Yankees celebrate with the trophy after their 7-3 win against the Philadelphia Phillies in Game Six of the 2009 MLB World Series at Yankee Stadium on November 4, 2009 in the Bronx borough of New York City. According to reports, Rivera suffered a tear to his anterior cruciate ligament (ACL) in his right knee as well as a partially torn meniscus while shagging balls in the outfield during batting pratice on May 3, 2012 at Kauffman Stadium in Kansas City, Missouri. (Photo by Jed Jacobsohn/Getty Images)

NEW YORK, NY - FILE: Mariano Rivera #42 of the New York Yankees celebrates after becoming the all-time leader in saves after defeating the Minnesota Twins at Yankee Stadium on September 19, 2011 in the Bronx borough of New York City. Rivero recorded his 602 save. According to reports, Rivera suffered a tear to his anterior cruciate ligament (ACL) in his right knee as well as a partially torn meniscus while shagging balls in the outfield during batting pratice on May 3, 2012 at Kauffman Stadium in Kansas City, Missouri. (Photo by Patrick McDermott/Getty Images)

NEW YORK, NY - APRIL 30: Russell Martin #55 of the New York Yankees hands the ball to Mariano Rivera #42 against the Baltimore Orioles during their game on April 30, 2012 at Yankee Stadium in the Bronx borough of New York City. (Photo by Al Bello/Getty Images)

NEW YORK, NY - APRIL 30: Mariano Rivera #42 of the New York Yankees pitches against the Baltimore Orioles during their game on April 30, 2012 at Yankee Stadium in the Bronx borough of New York City. (Photo by Al Bello/Getty Images)

NEW YORK, NY - APRIL 30: Mariano Rivera #42 and Russell Martin #55 of the New York Yankees celebrate a 2-1 victory against the Baltimore Orioles on April 30, 2012 at Yankee Stadium in the Bronx borough of New York City. (Photo by Al Bello/Getty Images)

ARLINGTON, TX - APRIL 23: Mariano Rivera #42 of the New York Yankees throws against the Texas Rangers at Rangers Ballpark in Arlington on April 23, 2012 in Arlington, Texas. (Photo by Ronald Martinez/Getty Images)

ARLINGTON, TX - APRIL 23: Mariano Rivera #42 of the New York Yankees throws against the Texas Rangers at Rangers Ballpark in Arlington on April 23, 2012 in Arlington, Texas. (Photo by Ronald Martinez/Getty Images)

ARLINGTON, TX - APRIL 23: Mariano Rivera #42 of the New York Yankees throws against the Texas Rangers at Rangers Ballpark in Arlington on April 23, 2012 in Arlington, Texas. (Photo by Ronald Martinez/Getty Images)

ARLINGTON, TX - APRIL 23: Mariano Rivera #42 of the New York Yankees throws against the Texas Rangers at Rangers Ballpark in Arlington on April 23, 2012 in Arlington, Texas. (Photo by Ronald Martinez/Getty Images)