Biggest difference between Walker back in the NFL compared to him in MMA/Strikeforce/wherever is he sees his opponents coming at him and he gets time to prepare for each opponent. In football he doesnt have time to prepare for each tackle before it happens. Like Favre, first blindside hit and he'd be out. Don't care how good of in shape he is, his body/bones are still going on 50. NFL players are bigger and stronger now than when he played before and younger. First time Ray Lewis got a hit on Walker it would be over for him. And just hearing Rice saying that is hilarious. NFL already has its beens who held on to long. AFter the Favre fiasco of the past few years, do we really need another over the hill athlete bringing drama into the already troubled NFL?