Offensive line shakeup

[Monkeydad]

Derrick Dockery is in danger of losing his starting job to Kory Lichtensteiger.

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The offensive line's poor play has been a growing concern internally for some time, according to team sources who have watched as the first-team group has struggled during practice. With three new starters, the line already was in a state of flux to start the preseason. And that was before left guard Derrick Dockery was in danger of losing his starting job to Kory Lichtensteiger, who was out of football last season after being waived by the Minnesota Vikings in late September.

The coaching staff believes Dockery is a bad fit for Shanahan's zone blocking scheme, according to multiple people familiar with the situation. Right tackle Jammal Brown has not yet regained his Pro Bowl form after sitting out the entire 2009 season because of injuries, gifted rookie left tackle Trent Williams could miss Sunday's game against the St. Louis Rams because of knee and toe injuries, right guard Artis Hicks probably would be more effective in a backup/swing role and cerebral center Casey Rabach struggles against the league's big nose guards.

This is surprising, because Dock is a solid lineman, but I guess the offensive scheme can make or break any player. Someone really needs to step up and take Rabach's job.