Texans’ running game still questionable

Matt Schaub has shown enough poise and flash during Houston’s first two preseason games that the Texans should feel good about their new-look passing game. The running game? That’s more of a mystery. While the starting running game hasn’t been bad, it would be a stretch to call it good. While Schaub was 9-of-12 for 108 yards and ran for a touchdown to post a 102.1 quarterback rating in a 33-20 win…