Rob Gronkowski got his jersey number wrong

The Patriots are practicing at an undisclosed location in Southern California this week because Bill Belichick is a crazy person. They also decided not to wear numbers on their practice jerseys, for some reason.

Tight end Rob Gronkowski wasn't crazy about the blank jerseys, so he decided to add a number to his.

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NFL rules stipulate that tight ends can only wear numbers between 80 and 89. He would not be an eligible receiver if he wore that number in a game.

- Dan Gartland