"They both have rotated the entire year," Margraff said. "We've been playing four guards when they're all healthy. Zach is a senior who is a very smart player, a savvy player. He's really playing the best football he has played in his career. Blake is a very talented player. He can play guard, he can play tackle, and we have him take center snaps every day. So he's a terrific player. They're both coming along."