New McCoy leads No. 24 Texas over BYU,

By JIM VERTUNO | September 10, 2011 | 10:25 PM EDT

Texas' Garrett Gilbert (7) is hit by BYU's Travis Uale, left, during the first quarter an NCAA college football game, Saturday, Sept. 10, 2011, in Austin, Texas. (AP Photo/Eric Gay)

AUSTIN, Texas (AP) — Backup quarterbacks Case McCoy and David Ash pumped new life into a struggling Texas offense and Cody Johnson scored a fourth-quarter touchdown as the No. 24 Longhorns rallied to beat BYU 17-16 Saturday night.

With McCoy and Ash rotating snaps after ineffective starter Garrett Gilbert was pulled in the second quarter, the Longhorns (2-0) used a punishing running game to rally from a 13-3 halftime deficit.

McCoy took most of the snaps on the drive to the winning touchdown, twice hitting Jaxon Shipley for big gains before Johnson punched in his second touchdown.

Jake Heaps led BYU (1-1)with 235 yards passing with one touchdown and two interceptions.