He made the play on the snap over Barkley. He was the first one there, and Barkley was within reach of the ball and Tinsley dove and knocked Barkley off the ball an in doing so he may have propelled the ball further down the field. I think that play turned the momentum, switch, or mojo in the Gopher side.
Not to take anything away from Tinsley but that was actually #21 Brock Voreen