What are you doing Joba?
You are professional athlete, you shouldn't be jumping on trampolines with your kid. Let your kid bounce around like a rubber ball. He's a kid and they are indestructible. You are a grown man. Why are you jeopardizing your athletic future by acting like a kid. Those days are gone.
Joba Chamberlain is a key component of the Yankees bullpen and he is coming off Tommy John surgery. Now he's had surgery for busting up his ankle and will be in a cast for 6 weeks. They are saying maybe he could be back in July. That seems pretty ambitious for me.
While it is disappointing for an athlete to get hurt doing something he shouldn't be doing, it really is hard to be mad at the guy for playing with his son. Hope he heals up quickly and fully.