Apr. 25—The Dallas Cowboys selected former Oklahoma offensive tackle Tyler Guyton with the 29th overall pick Thursday evening. Guyton became the 49th Sooner to be taken in the first round and the second season in a row the program has had an offensive tackle taken in round one. At 6-7, 328-pounds, Guyton only had 20 career collegiate starts between TCU and Oklahoma. Still, he was praised by…