One early mistake did nothing to rattle Matt Schaub. Schaub stepped back to pass on the first play of the game and threw right to 49ers linebacker Ahmad Brooks a few yards away. After that rare blunder, Houston's reliable quarterback was spot-on. Schaub recovered after the early interception, leading the Texans on scoring drives in each of their next three series in a 30-7 exhibition rout of the rebuilding San Francisco 49ers on Saturday night.