Get ready for injuries. I played high school and college football and never had a serious injury. I'm talking about after playing FB in a wishbone offense.
Then I started playing softball about five years ago. My injury list (all first time ever): torn left hamstring, torn right hamstring, broken wrist in two places, and torn MCL. I recovered from all very fast, including from the torn MCL (three weeks, no surgery), because of the years of driving iron, but man it has been really embarrassing. Getting old sucks.
On the other hand, one of my co-workers still plays hard ball and he's in his 50s.