(Photo credit: Scott Wachter-Imagn Images)Arch Manning passed for 309 yards and three touchdowns and ran for two more scores as No. 8 Texas dismantled hapless Sam Houston 55-0 on Saturday evening in Austin, Texas in what amounted to a glorified scrimmage for the Longhorns. The Longhorns (3-1) outgained Sam Houston 607-113 and amassed 10 tackles for a loss, including five sacks. Quarterback Hunter Watson finished with 118 total yards (86 passing and 32 on the ground) in the loss for Sam Houston (0-4). Shipley's 38-yard field goal with 4:54 in the third and Christian Clark's 5-yard TD run with 13:22 to play stoked the lead to 55-0.