After sputtering to a 4-12 record last season, the Chiefs looked like a different team in Week One, upending the favored Chargers in raucous Arrowhead Stadium. The biggest difference from a year ago: the defense, which showed increased intensity and aggressiveness under new coordinator Romeo Crennel. Most notably, we hear DE Glenn Dorsey played the best game of his pro career, locking down his side of the field and pressuring the quarterback. One of the league's worst run defenses in 2009, allowing 156.5 yards per game, the Chiefs clamped down on San Diego, giving up 109 yards on the ground and just 3.8 per carry. Much of that was due to Dorsey's dominance up front, something that head coach Todd Haley took note of. "At every stage he has been clearly ahead of where he was (last season)," Haley said. "I think Glenn Dorsey played the best that I have seen him play since I have been here."