Tom Brady is proving, yet again, he's great at everything ... revealing on Tuesday during a batting practice session with Rob Gronkowski that he's got a buttery smooth baseball swing!!
The 44-year-old hit up a diamond in what looked like South Florida with Gronk and his longtime trainer, Alex Guerrero, and took some sweet hacks from a left-handed stance.
Brady crushed two balls in the clip -- and looked every bit like he belonged in the batter's box.