Former New England Patriots tight end Rob Gronkowski has earned a reputation for being a meathead and a frat boy in NFL circles, but according to one former teammate, Gronk has a penchant for numbers. Despite garnering an endless stream of “ha, Gronk dumb” jokes during Netflix’s roast of Tom Brady, Gronk is apparently somewhat of a savant with numbers, his former Pats teammate Julian Edelman told the Pardon My Take podcast Monday. Edelman was recounting to the Barstool podcast hosts a joke he ultimately decided not to use in the roast. “This is one of the jokes, I was gonna have Gronk in on it…