First the Houston Texans were playing without quarterback Matt Schaub and now they will be playing the rest of the game against the Chiefs without their star running back Arian Foster. According to the Associated Press

Texans running back Arian Foster has been ruled out of Sunday’s game against the Kansas City Chiefs with a hamstring injury after leaving in the first quarter.
Foster went to the locker room after carrying four times for 11 yards on the Texans’ opening drive. Ben Tate was in at running back when Houston began its second possession.
Foster was listed as probable on Friday’s injury report with thumb chest and hamstring injuries. He had an AFC-leading 531 yards rushing coming into the game.

This is a tough loss for the Texans as Foster has been a dominant force in the NFL this season. He will not return to the game and the Texans will have to play with Ben Tate in the backfield who isn’t a bad option either.