Charles Barkley: Johnny Manziel has “got to watch himself”

Beware of camera phones. And please: easy with the selfies. In an interview with Cleveland radio station 92.3 FM on Wednesday, “NBA on TNT” analyst Charles Barkley was asked about Browns quarterback Johnny Manziel, whose offseason activities have left a social media trail. And Barkley, for his part, believes Manziel needs to exercise discretion in…