Former New England Patriots tight end Rob Gronkowski is doing anything and everything he can to stay in shape physically and mentally.

Gronk has suffered his share of concussions and when he announced his retirement earlier this year, he has started a special nutritional program that includes physical therapy, training and even doing jigsaw puzzles which is something talks about on the latest edition of the CBS News show, CBS Sunday Morning.

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Gronk went on to say the puzzles also help with his mental sharpness.

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