Andre Agassi is best known for his strong, smart playing style, which helped him win tennis championships throughout the 1990s.
Lance Armstrong is a professional American cyclist and testicular cancer survivor who, in 2012, was stripped of the seven Tour de France titles he won from 1999 to 2005 due to evidence of performance-enhancing drug use.
Jose Canseco is best known for his record-breaking Major League Baseball career.
Former pro-tennis player Jennifer Capriati is known for her incredible comeback after several personal struggles. In 1990 she was the youngest player to ever be ranked in the Women's Tennis Association top ten.
Former Major League Baseball player Roger Clemens, of the Red Sox, won 7 Cy Young Awards and recorded 4,672 strikeouts. He was indicted for perjury in 2010.
Justin Gatlin sprinted to fame by setting a world record in the 100-meter race. Months later, he tested positive for a banned substance and was suspended. Gatlin is slated to make a comeback at the 2012 Summer Olympics.
Hulk Hogan was one of the most beloved figures in the World Wrestling Federation in the 1980s, known for his flamboyance and the frenzy of his fans—Hulkamania.
Roy Jones Jr. is a record-holding boxing champion known for his matches on HBO who has also done TV commentary work.
Olympic gold medalist Florence Joyner brought style to track and field with form-fitting bodysuits, six-inch fingernails and amazing speed. She still holds the world records in the 100- and 200-meter events.
Cyclist Floyd Landis won the 2006 Tour de France. Urine tests later revealed that he was using performance-enhancing drugs, and he was banned from the sport for two years.
One of the most powerful hitters in baseball history, Mark McGwire briefly held the record for most home runs in a single season.
Boxer "Sugar" Shane Mosley won championships in three separate weight classes to forge a legacy as one of the sport's most accomplished performers.
Swimmer Michael Phelps has set the record for winning the most medals, 22, of any Olympic athlete in history.
Manny Ramirez is a Dominican-American baseball player who helped the Red Sox win the World Series after an 86-year losing streak.
In 2007, American baseball player Alex Rodriguez became the youngest player in major league baseball history to hit 500 career home runs.
Goalkeeper Hope Solo helped the U.S. Women's Soccer Team win gold medals at the 2008 and 2012 Olympic Games. She also appeared on Dancing with the Stars in 2011.
Sammy Sosa is a former MLB slugger, most notably with the Chicago Cubs, with whom he chased Roger Maris's home run record.
American football player Lawrence Taylor was a member of the New York Giants and is considered one of the best linebackers in the history of the game.
Star Atlanta Falcons quarterback Michael Vick's promising career has been tainted by illegal activities including involvement in an illegal dog-fighting ring.