Neither one of them. Tiger probably hasn't had a physical confrontation in his life so he wouldn't be able to take a hit or deliver one and Shaq doesn't have the coordination in my opinion to play any position in the NFL. Look at other "athletes" who've tried. Brock Lesner comes to mind with his ill fated attempt to leave the "hollywood wrestling" scene for the NFL. He's a superior athlete with a ton of coordination but couldn't hack it in the NFL. What makes you think either Tiger or Shaq could?