MotoGP and Valentino Rossi anyone? 9 World Championships won.
He placed third in the 2010 season in which he suffered a compound break of his tibia after crashing at 120mph... He returned to racing 41 days after the crash and for his first race back finished fourth.
Also a contendor:
Michael Phelps, I'd post pics but I dont think anyone (including myself) really wants to google image search for him and get a bunch of speedo pictures back *shivers*