Gronk improv now.
Rob Gronkowski took some time off from his rigid off-season party regimen to appear on Whose Line Is It Anyway?, which, if you had given me a 5,000 guesses, is not a show I would have picked him to make a guest appearance on.
And to nobody's surprise, Gronk is pretty into boob jokes:
Catching a pass over the middle of the field during an NFL game takes a certain amount of fearlessness, but attempting to go toe-to-toe with some of the best improvisers in the game is an entirely different -- arguably equally admirable -- act of sheer bravery (or some other word). [Sporting News, Vine via Guyism]