"We had planned going into the season with Matt Kalil, Alex Boone, Joe Berger at center, and Mike Harris -- who didn't play for us (this year due to injury) -- at right guard and Andre Smith," he said. "We thought we were going to have a pretty good offensive line. No excuses but we lost a lot of those guys and we lost them very early in the season. So, it's difficult to plug offensive linemen in, especially when you are getting down into your third and fourth offensive linemen. But we have to do a better job making sure that we have the quality depth not only at that position but every position."