Like their counterparts in the pros, more college football stars are starting to snatch up trademark rights to their names, nicknames and fan slogans.The NCAA generally forbids its players from cashing in on their athletic success, but by gaining legal ownership of phrases tied to their personal brands, players can pave the way for lucrative licensing deals in the future and can prevent others from exploiting their names.This month, Ohio State University running back Ezekiel Elliott applied for five trademarks, including …