That one zone read play by Tyrone against OU was a thing of beauty. Called back because of a phantom hold.
Though Tyrone Swoopes threw a 73 yard TD pass and Armante Foreman caught it, Dylan Haines's 74-yard interception return against Iowa State was the Longhorn's single-play best in 2014. You know, the guy who began fall camp as a non-scholarship player.
Since the question didn't limit the answer to offensive plays only I went with Haines pic and return.