Michael Phelps

BEIJING - AUGUST 16: (L-R) Ian Crocker of the United States congratulates Michael Phelps of the United States on his victory in the Men's 100m Butterfly Final held at the National Aquatics Centre during Day 8 of the Beijing 2008 Olympic Games on August 16, 2008 in Beijing, China. By winning gold in the Men's 100m Butterfly Phelps tied Mark Spitz's record of winning seven gold medals in a single Olympic Games. (Photo by Jamie Squire/Getty Images)

Getty Images

BEIJING - AUGUST 16: Michael Phelps of the United States celebrates victory in the Men's 100m Butterfly Final held at the National Aquatics Centre during Day 8 of the Beijing 2008 Olympic Games on August 16, 2008 in Beijing, China. By winning gold in the Men's 100m Butterfly Phelps tied Mark Spitz's record of winning seven gold medals in a single Olympic Games. (Photo by Jamie Squire/Getty Images)

Getty Images

BEIJING - AUGUST 16: Michael Phelps of the United States celebrates victory in the Men's 100m Butterfly Final held at the National Aquatics Centre during Day 8 of the Beijing 2008 Olympic Games on August 16, 2008 in Beijing, China. By winning gold in the Men's 100m Butterfly Phelps tied Mark Spitz's record of winning seven gold medals in a single Olympic Games. (Photo by Ezra Shaw/Getty Images)

Getty Images

BEIJING - AUGUST 16: Michael Phelps of the United States celebrates victory in the Men's 100m Butterfly Final held at the National Aquatics Centre during Day 8 of the Beijing 2008 Olympic Games on August 16, 2008 in Beijing, China. By winning gold in the Men's 100m Butterfly Phelps tied Mark Spitz's record of winning seven gold medals in a single Olympic Games. (Photo by Shaun Botterill/Getty Images)

Getty Images

BEIJING - AUGUST 16: Michael Phelps of the United States competes in the Men's 100m Butterfly Final held at the National Aquatics Centre during Day 8 of the Beijing 2008 Olympic Games on August 16, 2008 in Beijing, China. (Photo by Shaun Botterill/Getty Images)

Getty Images

BEIJING - AUGUST 16: Michael Phelps of the United States celebrates victory in the Men's 100m Butterfly Final held at the National Aquatics Centre during Day 8 of the Beijing 2008 Olympic Games on August 16, 2008 in Beijing, China. By winning gold in the Men's 100m Butterfly Phelps tied Mark Spitz's record of winning seven gold medals in a single Olympic Games. (Photo by Shaun Botterill/Getty Images)

Getty Images

Michael Phelps of the United States on his way to winning the gold medal in the men's 200-meter individual medley during the swimming competitions in the National Aquatics Center at the Beijing 2008 Olympics in Beijing, Friday, Aug. 15, 2008. (AP Photo/Mark Baker)

AP

Michael Phelps of the United States on his way to winning the gold medal in the men's 200-meter individual medley during the swimming competitions in the National Aquatics Center at the Beijing 2008 Olympics in Beijing, Friday, Aug. 15, 2008. (AP Photo/Mark Baker)

AP

Michael Phelps of the U.S. prepares to swim in the men's 100m butterfly semi-finals at the National Aquatics Center during the Beijing 2008 Olympic Games August 15, 2008. REUTERS/Wolfgang Rattay (CHINA)

Reuters

Michael Phelps of the U.S. swims in the men's 100m butterfly semi-finals at the National Aquatics Center during the Beijing 2008 Olympic Games August 15, 2008. REUTERS/David Gray (CHINA)

Reuters