Thursday Matchup: Saints at Falcons Saints (5-6) at Falcons (10-1) Line: Falcons by 4 The saying goes that a broken clock is right twice a day. A similar theory may be in play this week when the Saints' defense, the worst in the N.F.L. against the run, gets another chance to look good while stopping the eminently stoppable Michael Turner. While doing so, the Saints may want to keep their eyes open for the pint-sized Jacquizz Rodgers, who may be scurrying past them. The Saints allow an N.F.L.-worst 156.5 yards a game on the ground. They're also remarkably consistent, having allowed 100 or more yards in every game other than their Week 10 win over the Falcons, when they allowed only 46. Turner, a former All-Pro, was held to 15 yards on 13 carries in that game, making the decision to keep running the ball with him curious. Rodgers had 29 yards on three carries and added 33 more on four receptions. Falcons Coach Mike Smith has acknowledged considering employing more of a running back by committee approach. That could be trouble for New Orleans, especially if Rodgers makes it a committee of one.