Apr. 10—OSU’s Mike Gundy has tried to limit senior receiver Brennan Presley’s reps this spring. His efforts have failed. The Cowboy head coach has told Presley to take a step back and keep his body fresh. Despite that, when Gundy watches practice from the Sherman E. Smith catwalk, he can’t help but notice No. 80 in orange. Right in the thick of things. “I look up and he’s back in there,” Gundy…