It does no good to be a great player if you can't stay healthy. Watson is like a fine tuned race horse. It doesn't take much to tweak something.
I suspect that even New England is on the verge of letting Gronk go. Too much money for a guy who is hurt too much. And, clearly, he is not needed to win the Superbowl. And some chump is bound to give them a 1st or 2nd round pick for Gronk.
If Quinn can't make 16 games this season, he's gone. He's missed way too many games (hoping the shift to OLB will help that).
That's the NFL.