The procedure is too expensive to use on a soldier, but the franchise had a billion dollars riding on your arm, so when you got injured last year they made a goodwill deal with DARPA to grow you a new one.
It's all stem cells, tissue engineering, and nerve grafts. All natural.
It feels alien. It works great. It got you the Super Bowl and the sport's biggest ever endorsement deal.
You have noticed your teammates aren't protecting themselves from injuries as well as they used to. It makes you proud to belong to the team.