Oklahoma Sooners QB Baker Mayfield is now a Cleveland Brown. Here are 10 things you might not know about him.1. Twice a walk-onIt's well known by now, but Mayfield played in eight games as a walk-on true freshman at Texas Tech in 2013. He left the program after one season -- citing "miscommunication" with coach Kliff Kingsbury -- and did not play in the Red Raiders' bowl game that year.The ensuing saga was, well, a little messy.