PHILADELPHIA -- LeSean McCoy led the NFL in rushing last season. The rest of the NFL noticed.

That has more to do with the Philadelphia Eagles' run-game woes this season than anything, according to center David Molk. Injuries to offensive linemen are a factor -- they are the reason Molk and not Jason Kelce is playing center for the Eagles right now -- but the focus would be on McCoy no matter what.

"Teams are adapting," Molk said Tuesday. "That's what happens. We do well at something, we showed something really great last year, and now teams are realizing, 'We've got to change.' We've got to adapt and find a way to slow them.' So now they've made their chess move. Now it's our turn. We have to find our option to get the upper hand again."

Molk obviously isn't of the school of thought that the Eagles' move will have to wait until Kelce and left guard Evan Mathis are back from their injuries. Neither are the coaches. Offensive coordinator Pat Shurmur gave a sense of their thinking when asked what he expected from right tackle Lane Johnson.

"We expect everybody that goes in there to play winning football," Shurmur said. That would include Molk and left guard Matt Tobin, who is filling in for Mathis.

Just as important, the players themselves expect to perform at a high level.

"We've just got to clean up some stuff, stay on some blocks," left tackle Jason Peters said. "We just have to get it rolling, man. Once we get it rolling, it's going to be downhill from there."

The Eagles didn't run the ball much in San Francisco Sunday, but their offense was only on the field for 17 minutes, 43 seconds.

"We didn't have many plays, period," offensive coordinator Pat Shurmur said. "I think that was a function of it. What we need to do is do a better job of staying on the field so we get more plays. We had a lot of great things that we wanted to do. We didn't stay on the field.

"The good news is we are going to continue to run the football, and so we have got very talented players and we feel good about our ability to get it going. We have to continue to run the ball like we've been. I think it's a mixture of things. I think we can, you know, from whether it's blocking or hitting the hole or whatever. I just think we need to execute better."