IRVING  (AP)  The Dallas Cowboys defense is suddenly getting run over.

Only two weeks ago, the Cowboys were the league’s top rushing defense. Then LeSean McCoy of Philadelphia ran for a career-high 185 yards against them and Seattle’s Marshawn Lynch followed with his first 100-yard game in nearly three years.

After allowing only 418 yards rushing the first six games, the Cowboys have allowed 401 the last two. They’re now 10th in the NFL.

Coach Jason Garrett believes they just have to improve their execution. They need to do that fast with Buffalo and Fred Jackson, the NFL’s third-leading rusher, heading to town Sunday.

Jackson, who grew up where Cowboys Stadium now is, already has five 100-yard rushing games this season.

(Copyright 2011 by The Associated Press. All Rights Reserved.)