Michael Phelps

Olympic champion Michael Phelps has announced his intention to retire after the London Olympics. 

Olympian Michael Phelps throws out the ceremonial first pitch prior to game 3 of baseball's National League Division Series between the Los Angeles Dodgers and the Arizona Diamondbacks, Monday, Oct. 9, 2017, in Phoenix. (AP Photo/Rick Scuteri)

FILE - In this July 12, 2017 file photo, Olympic swimmer Michael Phelps arrives at the ESPYS in Los Angeles. Phelps appears in the documentary, “Angst” to share his story of being bullied and depressed. (Photo by Jordan Strauss/Invision/AP, File)

Olympian Michael Phelps waves before throwing out the ceremonial first pitch prior to game 3 of baseball's National League Division Series between the Los Angeles Dodgers and the Arizona Diamondbacks, Monday, Oct. 9, 2017, in Phoenix. (AP Photo/Ross D. Franklin)

Olympian Michael Phelps waves before throwing out the ceremonial first pitch prior to game 3 of baseball's National League Division Series between the Los Angeles Dodgers and the Arizona Diamondbacks, Monday, Oct. 9, 2017, in Phoenix. (AP Photo/Ross D. Franklin)

Olympian Michael Phelps throws out the ceremonial first pitch prior to game 3 of baseball's National League Division Series between the Los Angeles Dodgers and the Arizona Diamondbacks, Monday, Oct. 9, 2017, in Phoenix. (AP Photo/Rick Scuteri)

Olympian Michael Phelps throws out the ceremonial first pitch prior to game 3 of baseball's National League Division Series between the Los Angeles Dodgers and the Arizona Diamondbacks, Monday, Oct. 9, 2017, in Phoenix. (AP Photo/Rick Scuteri)

FILE - In this Aug. 7, 2016, file photo United States swimmer Michael Phelps encourages his teammates in the final of the men's 4x100-meter freestyle relay during the swimming competitions at the 2016 Summer Olympics in Rio de Janeiro, Brazil. Phelps says he has "no desire" to return to competitive swimming, but he's eager to stay involved with the sport and cheer on those who follow in his enormous wake. (AP Photo/Lee Jin-man, File)

FILE - In this Aug. 7, 2016, file photo United States swimmer Michael Phelps encourages his teammates in the final of the men's 4x100-meter freestyle relay during the swimming competitions at the 2016 Summer Olympics in Rio de Janeiro, Brazil. Phelps says he has "no desire" to return to competitive swimming, but he's eager to stay involved with the sport and cheer on those who follow in his enormous wake. (AP Photo/Lee Jin-man, File)

FILE - In this Aug. 9, 2016, file photo, United States' swimmer Michael Phelps celebrates winning his gold medal in the men's 200-meter butterfly with his fiance Nicole Johnson and baby Boomer during the swimming competitions at the 2016 Summer Olympics in Rio de Janeiro, Brazil. Phelps says he has "no desire" to return to competitive swimming, but he's eager to stay involved with the sport and cheer on those who follow in his enormous wake. (AP Photo/Matt Slocum, File)

Former Olympic swimming champion Michael Phelps attends the putting contest at the Omega European Masters Golf Tournament in Crans Montana, Switzerland, Saturday, Sept. 9, 2017. (Alexandra Wey/Keystone via AP)

Former Olympic swimming champion Michael Phelps and British cricketer Kevin Pietersen, from left, share a laugh during the putting contest at the Omega European Masters Golf Tournament in Crans-Montana, Switzerland, Saturday, Sept. 9, 2017. (Alexandra Wey/Keystone via AP)

FILE - In this Aug. 9, 2016, file photo, United States' swimmer Michael Phelps celebrates winning his gold medal in the men's 200-meter butterfly with his wife Nicole and baby Boomer during the swimming competitions at the 2016 Summer Olympics, in Rio de Janeiro, Brazil. Phelps announced on Instagram Aug. 29, 2017, that Nicole is pregnant. (AP Photo/Matt Slocum, File)

FILE - In this Aug. 9, 2016, file photo, United States' Michael Phelps has tears in his eyes as he shows off his gold medal after the men's 200-meter butterfly final at the 2016 Summer Olympics in Rio de Janeiro, Brazil. In terms of medals, no one come close to the Baltimore Bullet. (AP Photo/Michael Sohn, File)

Swimmer, Michael Phelps walks the back ninth during the first round of the PGA Championship golf tournament at the Quail Hollow Club Thursday, Aug. 10, 2017, in Charlotte, N.C. (AP Photo/Chris O'Meara)

FILE - In this July 13, 2017 file photo, retired Olympic swimmer Michael Phelps arrives at the Kids' Choice Sports Awards at UCLA's Pauley Pavilion in Los Angeles. Phelps lost to a shark in the Discovery Channel’s Shark Week special “Phelps vs. Shark: Great Gold vs. Great White," which aired on July 23, 2017. It was billed as a race between Phelps and the predator but much to the disappointment of some Twitter users, Phelps didn’t actually swim in the water next to the shark.(Photo by Richard Shotwell/Invision/AP, File)

FILE - In this Thursday, Aug. 11, 2016, file photo, the fin of a great white shark is seen swimming a past research boat in the waters off Gansbaai, South Africa. Olympic champion Michael Phelps lost to a simulated shark in the Discovery Channel’s Shark Week special “Phelps vs. Shark: Great Gold vs. Great White,” which aired July 23, 2017. (AP Photo/Schalk van Zuydam, File)

Discovery Channel asks Shark Week viewers to be donors, too

This undated image released by Discovery Channel shows a great white shark. The channel's annual Shark Week will include requests to support Oceana, an advocacy group focused on ocean conservation. Shark Week's opening lineup Sunday includes "Phelps vs. Shark: Great Gold vs. Great White," with Olympian Michael Phelps testing his speed against that of a great white shark. (Discovery Channel via AP)

FILE - In this July 13, 2017 file photo, retired Olympic swimmer Michael Phelps arrives at the Kids' Choice Sports Awards at UCLA's Pauley Pavilion in Los Angeles. Discovery Channel's Shark Week's opening lineup Sunday, July 23, includes "Phelps vs. Shark: Great Gold vs. Great White," with Phelps testing his speed against that of a great white shark. (Photo by Richard Shotwell/Invision/AP, File)

FILE - In this July 13, 2017 file photo, retired Olympic swimmer Michael Phelps arrives at the Kids' Choice Sports Awards at UCLA's Pauley Pavilion in Los Angeles. Discovery Channel's Shark Week's opening lineup Sunday, July 23, includes "Phelps vs. Shark: Great Gold vs. Great White," with Phelps testing his speed against that of a great white shark. (Photo by Richard Shotwell/Invision/AP, File)

This undated image released by Discovery Channel shows a great white shark. The channel's annual Shark Week will include requests to support Oceana, an advocacy group focused on ocean conservation. Shark Week's opening lineup Sunday includes "Phelps vs. Shark: Great Gold vs. Great White," with Olympian Michael Phelps testing his speed against that of a great white shark. (Discovery Channel via AP)

Michael Phelps gets slimed as he accepts the legend award at the Kids' Choice Sports Awards at UCLA's Pauley Pavilion on Thursday, July 13, 2017, in Los Angeles. (Photo by Chris Pizzello/Invision/AP)

Michael Phelps gets slimed as he accepts the legend award at the Kids' Choice Sports Awards at UCLA's Pauley Pavilion on Thursday, July 13, 2017, in Los Angeles. (Photo by Chris Pizzello/Invision/AP)

Michael Phelps accepts the legend award at the Kids' Choice Sports Awards at UCLA's Pauley Pavilion on Thursday, July 13, 2017, in Los Angeles. (Photo by Chris Pizzello/Invision/AP)

Michael Phelps gets slimed as he accepts the legend award at the Kids' Choice Sports Awards at UCLA's Pauley Pavilion on Thursday, July 13, 2017, in Los Angeles. (Photo by Chris Pizzello/Invision/AP)

Michael Phelps gets slimed as he accepts the legend award at the Kids' Choice Sports Awards at UCLA's Pauley Pavilion on Thursday, July 13, 2017, in Los Angeles. (Photo by Chris Pizzello/Invision/AP)

Retired Olympic swimmer Michael Phelps arrives at the Kids' Choice Sports Awards at UCLA's Pauley Pavilion on Thursday, July 13, 2017, in Los Angeles. (Photo by Richard Shotwell/Invision/AP)

Retired Olympic swimmer Michael Phelps arrives at the Kids' Choice Sports Awards at UCLA's Pauley Pavilion on Thursday, July 13, 2017, in Los Angeles. (Photo by Richard Shotwell/Invision/AP)

Retired Olympic swimmer Michael Phelps arrives at the Kids' Choice Sports Awards at UCLA's Pauley Pavilion on Thursday, July 13, 2017, in Los Angeles. (Photo by Richard Shotwell/Invision/AP)

Retired Olympic swimmer Michael Phelps, right, and Nicole Johnson arrive at the Kids' Choice Sports Awards at UCLA's Pauley Pavilion on Thursday, July 13, 2017, in Los Angeles. (Photo by Richard Shotwell/Invision/AP)

Retired Olympic swimmer Michael Phelps, right, and Nicole Johnson arrive at the Kids' Choice Sports Awards at UCLA's Pauley Pavilion on Thursday, July 13, 2017, in Los Angeles. (Photo by Richard Shotwell/Invision/AP)

Retired Olympic swimmer Michael Phelps, right, and Nicole Johnson arrive at the Kids' Choice Sports Awards at UCLA's Pauley Pavilion on Thursday, July 13, 2017, in Los Angeles. (Photo by Richard Shotwell/Invision/AP)

Michael Phelps accepts the award for best record-breaking performance at the ESPYS at the Microsoft Theater on Wednesday, July 12, 2017, in Los Angeles. (Photo by Chris Pizzello/Invision/AP)

Michael Phelps accepts the award for best record-breaking performance at the ESPYS at the Microsoft Theater on Wednesday, July 12, 2017, in Los Angeles. (Photo by Chris Pizzello/Invision/AP)

Nicole Johnson, left, and Michael Phelps arrive at the ESPYS at the Microsoft Theater on Wednesday, July 12, 2017, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)

Michael Phelps arrives at the ESPYS at the Microsoft Theater on Wednesday, July 12, 2017, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)

Michael Phelps arrives at the ESPYS at the Microsoft Theater on Wednesday, July 12, 2017, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)

FILE - In this June 2, 2017, file photo, Nathan Adrian, right, gets a handshake from Maxime Rooney, left, after Adrian won the men's 100-meter freestyle during the Arena Pro Swim Series swim meet in Santa Clara, Calif. Nathan Adrian had a strange sensation as he strolled around the pool during last week’s U.S. National Championships. Michael Phelps was nowhere to be found. Ryan Lochte was missing, too. And for the first time in almost two decades, the American men were heading into swimming’s long-course world championships without either of its two biggest names. (AP Photo/Marcio Jose Sanchez, File)

FILE - In this Sunday, April 23, 2017 file photo, Oklahoma City Thunder guard Russell Westbrook (0) shoots between Houston Rockets guard Patrick Beverley, rear, and guard James Harden, right, in the fourth quarter of Game 4 of a first-round NBA basketball playoff series in Oklahoma City. Olympic swimmer Michael Phelps and Oklahoma City Thunder star Russell Westbrook are among the finalists for best male athlete at the ESPY Awards. Tennis star Serena Williams and gymnast Simone Biles are two of the finalists for best female athlete. (AP Photo/Sue Ogrocki, File)

FILE - In this Saturday, Jan. 28, 2017 file photo, United States' Serena Williams makes a backhand return to her sister Venus during the women's singles final at the Australian Open tennis championships in Melbourne, Australia. Olympic swimmer Michael Phelps and Oklahoma City Thunder star Russell Westbrook are among the finalists for best male athlete at the ESPY Awards. Tennis star Serena Williams and gymnast Simone Biles are two of the finalists for best female athlete. (AP Photo/Aaron Favila, File)

FILE - In this Tuesday, Aug. 16, 2016 file photo, United States' Simone Biles completes her routine on the floor during the artistic gymnastics women's apparatus final at the 2016 Summer Olympics in Rio de Janeiro, Brazil. Olympic swimmer Michael Phelps and Oklahoma City Thunder star Russell Westbrook are among the finalists for best male athlete at the ESPY Awards. Tennis star Serena Williams and gymnast Simone Biles are two of the finalists for best female athlete. (AP Photo/Rebecca Blackwell, File)

FILE - In this Tuesday, Aug. 16, 2016 file photo, United States' Simone Biles completes her routine on the floor during the artistic gymnastics women's apparatus final at the 2016 Summer Olympics in Rio de Janeiro, Brazil. Olympic swimmer Michael Phelps and Oklahoma City Thunder star Russell Westbrook are among the finalists for best male athlete at the ESPY Awards. Tennis star Serena Williams and gymnast Simone Biles are two of the finalists for best female athlete. (AP Photo/Rebecca Blackwell, File)

In this Friday, Aug. 12, 2016 file photo, United States' Michael Phelps celebrates his silver medal in the men's 100-meter butterfly medals ceremony during the swimming competitions at the 2016 Summer Olympic in Rio de Janeiro, Brazil. Olympic swimmer Michael Phelps and Oklahoma City Thunder star Russell Westbrook are among the finalists for best male athlete at the ESPY Awards. Tennis star Serena Williams and gymnast Simone Biles are two of the finalists for best female athlete. (AP Photo/Lee Jin-man, File)

FILE - In this March 21, 2017, file photo, Michael Phelps and his wife, Nicole Johnson, smile during an NBA basketball game between the Los Angeles Lakers and the Los Angeles Clippers in Los Angeles. Phelps all but slammed the door on another return after leaving it ever-so slightly ajar in an interview with the Associated Press last month. "I'm happy," he said. "I think four years ago, I wasn't. I think being able to come back and being able to finish how I did and being able to get back to where I wanted to get to _ for me, at this point in my life and in my career, that's all I can ask for. Right?" he said. (AP Photo/Jae C. Hong, File)

FILE - In this March 21, 2017, file photo, Michael Phelps and his wife, Nicole Johnson, smile during an NBA basketball game between the Los Angeles Lakers and the Los Angeles Clippers in Los Angeles. Phelps all but slammed the door on another return after leaving it ever-so slightly ajar in an interview with the Associated Press last month. "I'm happy," he said. "I think four years ago, I wasn't. I think being able to come back and being able to finish how I did and being able to get back to where I wanted to get to _ for me, at this point in my life and in my career, that's all I can ask for. Right?" he said. (AP Photo/Jae C. Hong, File)

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