When I was younger, I played ten years of softball. In the last year I was on my way to playing for a college team, but I had a shoulder injury and couldn't throw overhand farther than a few feet. Even though I was a pitcher, I still needed to be able to throw the ball from home to first in case of a bunt, but I couldn't even throw it that far.
My father has had similar shoulder injuries and so we decided to rehabilitate our throwing arms with a weighted softball his friend recommended. We've played catch every day for two weeks and I've already seen significant improvements in my abilities. It has been great to play the game again and to spend a little time with my dad every day.
Are there any fun activities you've put on the back burner that you'd enjoy picking up again?