Former Heisman Trophy winner Herschel Walker has signed a deal to become the newest fighter for Strikeforce. The 47-year-old former running back will train for the next 8-to-12 weeks and plans to make his MMA debut in 2010.

“I will go in there and test myself against any 20 year old,” Walker said. “I know there will be naysayers and I’m fine with that. I want to prove to people who sit on a couch and don’t do anything but criticize other people that, if you’re a true athlete or martial artist, you’re not old until you can’t get up and walk around anymore. MMA fighters are said to be some of the best athletes in the world, my plan at the age of 47 is to show the world I am still one of the best athletes as well.”

This makes no sense for Walker. He doesn’t need the money and regardless of what he says, he’s way too old to start learning a new sport. We just hope he doesn’t get seriously injured.