A weekly look at what the Denver Broncos must fix:

A lot of what the Broncos had on the drawing board this past offseason has come to pass over their first six games: The defense is more athletic, the pass rush is disruptive and quarterback Peyton Manning directs an offense that can stress an opposing defense all over the field.

But the Broncos' offensive line? The group is still trying to figure things out. With San Diego Chargers defensive coordinator John Pagano next on the docket, the Broncos will need the line to settle in to deal with the aggressive, unpredictable looks the Chargers can offer.

The Broncos made a change this past Sunday with Paul Cornick moving to right tackle in place of Chris Clark. Coach John Fox said “things hadn’t gone real good’’ before the change. Manning has routinely muted pass-rush plans with his ability to locate the extra rushers in the formation before the snap and deliver the ball quickly. But the fact remains the Broncos, low sack numbers or not, have not handled how defenses have chosen to attack them.

The Broncos have struggled up front at times with stunts from opposing defensive linemen or rushers coming from off the ball, off the line of scrimmage and too often rushers have simply come free. San Francisco 49ers linebacker Ahmad Brooks tackled running back Ronnie Hillman for a 3-yard loss this past Sunday after Brooks was unblocked in a formation with the three tight ends and one extra tackle -- and that was after the Jets had sacked Manning twice with a three-man rush a week ago

Pagano will try to create some indecision as the Chargers have 12 players with at least one sack this season, especially through the middle of the formation where opponents have consistently attacked the gaps between center Manny Ramirez and guards Louis Vasquez and Orlando Franklin.