When a sitcom jumps the shark, it's not pretty: unbelievable plotlines crop up, little kids are brought on for cheap laughs, and clips shows relive the glory years.

Athletes jump the shark, too. Former Chicago Bulls great Scottie Pippen has six NBA championship rings, yet he's considering playing for a team in Finland.

David Beckham was the greatest soccer player in the world and has movies named after him. Then he signed with the L.A. Galaxy for $250 million and whatever was left of his soul.

At some point during those two athletes' transatlantic flights, the planes clearly passed over a great white. Here are the moments when 10 other great athletes took the leap from superstar to cartoon character.

(By the way, if you're not familiar with the term jumping the shark, see this site, or just watch Fonzie fly his sweet blue shorts over a great white in this clip.)

Check Out When Your Favorite Athlete Jumped the Shark>>