Herschel Walker is headed back into the cage.
The former NFL running back, now 48 years-old, will face Scott Carson on Saturday night in his second professional mixed martial arts bout; the fight will be carried on Showtime.
Walker said he hopes to show fans how much he's improved from his first fight early last year when he beat Greg Nagy by technical knockout.
In some ways this isn't completely foreign: Walker learned Tae Kwon Do in high school, and fought while playing at the University of Georgia.
"I've watched the MMA for years, even back when it was kind of a like a tough man contest," Walker told the Atlanta Journal-Constitution. "Now, since they have rules and stuff, I fell in love with it."
Walker's participation in MMA brings up a fascinating thought: Are there other NFL players who could succeed in the sport?
Let's put aside the specialties that fighters train in, and just focus on the basics. It would require an athlete with tremendous agility, strength, power, stamina and a bit of a mean streak. On just that alone, I think there would be some great fits.
Here are 25 NFL players who could have been great in MMA: