Why not go out on the top of your game like Barry did? These guys don't have to worry about money, so why not spare your body the current and future pain, and just retire when you are satisfied with your achievements?
Football takes a huge toll on the body, esp for RBs. He is probably doing the right thing physically as well. Plus Tiki is a smart dude, seeing that he is a UVa grad and all
, so he wants to do different things and I respect that.