19. Tyler Hamilton
Cycling and doping unfortunately go hand-in-hand. The doping brigade found alien red blood cells in Hamilton’s system back in 2003. However, he denied all wrongdoing. Hamilton said that he suffered from a condition called ‘chimerism.’ Incredibly rare, this condition is where an unborn twin passes some of its cells to their sibling. Hamilton said that it belonged to his unborn brother and not him.
At least Hamilton referred to an actual condition, unlike Brian Cushing. But it was so rare that officials totally disregarded this explanation and suspended him anyway. Excuses aside, the US Anti-Doping Agency put him out to pasture for two years. In 2011, Hamilton admitted to doping throughout his career so they were right. You just can’t trust some cyclists to be truthful, unfortunately.