Thanks to Error by Lions Coach Jim Schwartz, Texans Win DETROIT (AP) - Shayne Graham's 32-yard field goal with 2 minutes 21 seconds left in overtime lifted Houston to a 34-31 win over Detroit on Thursday as the Texans took advantage of a blunder by Lions Coach Jim Schwartz on a challenge flag. Lions Coach Jim Schwartz with the official Jerry Bergman during a disputed play that ended up costing the Lions. Rick Osentoski/Associated Press Schwartz threw a challenge flag he wound up regretting. Detroit kicker Jason Hanson had a chance to get Schwartz off the hook, but his 47-yard field goal attempt on the fifth possession of the overtime hit the right upright. Schwartz threw a challenge flag when Justin Forsett of Houston scored on an 81-yard touchdown run in the third quarter. Replays showed Forsett was down near midfield. But all touchdowns are automatically reviewed, so Schwartz's unnecessary action led to an unsportsmanlike conduct penalty and also negated that automatic review. "It's on me," Schwartz said to his assistant coaches and players on the sideline as he tapped his chest. Arian Foster ran for 102 yards and 2 scores, including a 1-yard run with 1:55 left in the fourth quarter to cap a 15-play, 97-yard drive that took 5:43 off the clock and tied the game at 31-31. Houston (10-1), the A.F.C. South leader, took its first lead when Graham's winner made up for a missed field goal earlier in overtime. The Texans have won five straight - two in a row in overtime - and if a handful of teams lose, they could be in the playoffs by the time they get back on the practice field after a long weekend. Detroit (4-7) has lost three straight.