She told Oprah she would've dominated even without drugs, but it was a little late by then. A former collegiate basketball star turned sprinter, Jones became the first woman to win five medals at a single instalment of the Summer Olympics, but eventually surrendered all of them after being implicated in the BALCO scandal. Her role in a cheque-fraud scheme was just a bonus indiscretion.
9. Shoeless Joe Jackson/Pete Rose
Call it a combo play. Jackson -- no, he wasn't a fictional character in Field of Dreams -- was the biggest name among those fingered in the Black Sox Scandal. While historians have disputed Jackson's role in throwing the 1919 World Series, nobody has come to the defence of Rose. One of the greatest hitters in baseball history, Charlie Hustle was banned for life for gambling on games as a player and manager.
8. Michael Vick
His current case of fumbleitis -- and even the herpes allegations against 'Ron Mexico' -- is nothing compared to the controversy the fleet-footed quarterback has stirred up in the past. Vick spent about 18 months in prison after investigators uncovered a dog-fighting ring on his property in Virginia. The most gruesome evidence was the way under-performing pitbulls were abused, something fans will not soon forget.
7. Tonya Harding
She's been featured on a sex tape, charged with drunk driving and domestic assault and has competed in the Celebrity Boxing ring. Hard to believe, but her reputation was ruined before any of that, the result of an attack on rival Nancy Kerrigan just before the 1994 Lillehammer Olympics. Harding wasn't wielding the weapon, but she was later charged for her role in planning the attack. Kerrigan recovered and won silver.
6. The Steroid Sluggers
Barry Bonds. Mark McGwire. Sammy Sosa. All three erased Roger Maris' single-season home run record during a smash-happy span of baseball history, and all three were eventually undone by accusations of performance-enhancing drug use. Ironically, one of the whistle-blowers in what will be remembered as the 'Steroid Era' was Jose Canseco, another guy who can thank drugs for his gaudy numbers at the plate.
5. Tiger Woods
He had the world's best golf swing and a blonde bombshell as a wife, but Tiger Woods lost both in 2009, when his infidelities became front-page news. As numerous women claimed extra-marital affairs with the star golfer, Woods was dropped by several sponsors and plummeted in the world rankings. He's once again winning tournaments and chasing Jack Nicklaus' major record, but his legacy will never be the same.
4. Mike Tyson
Iron Mike's reputation has taken several knockout blows. Tyson was on the road to reclaiming his title as the undisputed heavyweight champion of the world when he was charged with rape in 1992, resulting in a three-year stint in jail. He didn't earn any humanitarian awards five years later when he bit off a chunk of Evander Holyfield's ear during a much-anticipated bout. We'd need a full page -- or more -- to list all the other controversies that have been tied to Tyson.
3. Lance Armstrong
Unlike some of the others on this list, his star hasn't stopped falling yet. Armstrong became a hero to millions when he survived cancer and won a record-setting seven Tour de France titles. Turns out, he had some extra 'help' climbing the Pyrenees. Several of his former teammates tattled about his doping habits, resulting in a lifetime ban from his sport and prompting the disgraced cyclist to resign as chairman of his own Livestrong Foundation.
2. Ben Johnson
In 9.79 seconds, he became a Canadian hero and an international icon. Three days later, he was making headlines as the biggest drug cheat in track and field history. Johnson was the fastest man in a star-studded field in the 100-metre final at the 1988 Seoul Olympics -- in fact, he shattered the world record -- but failed his post-race drug test. Swimmer Mark Tewksbury summed it up best, hanging a sheet from his dorm in the Olympic village that read 'Hero to Zero in 9.79.'
1. O.J. Simpson
Even if you don't remember any of his highlight-reel touchdown runs, you probably remember O.J.'s run from the law in his Ford Bronco. The first NFL running back to rack up 2,000 rushing yards in a single season, Simpson was wanted in the murder of his ex-wife and her friend when he led police on an infamous low-speed chase that interrupted coverage of the 1994 NBA Final. He was acquitted of the murders and promised to find the killer but is now behind bars for armed robbery and kidnapping.