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Patriots tight end Rob Gronkowski is done for 2016.

Gronkowski has been placed on injured reserve after back surgery, the team announced.

Although the NFL does give each team one “return” designation to bring a player back from injured reserve, the Patriots have already used that designation on backup quarterback Jacoby Brissett. So Gronk can’t play again until 2017.

It’s a huge disappointment for Gronkowski, who is among the best tight ends ever to play the position when healthy — but who struggles to stay healthy for any significant period of time. This is his third back surgery, which raises questions about his future.

But for now, thoughts are on his present. Gronkowski will get to work rehabbing his back and attempt to be ready in time for the start of offseason work. And the Patriots will attempt to adjust their offense to losing its best playmaker.