Cory Lekkerkerker, listed second on the depth chart at right guard will move over to left tackle.
The Cal-Davis product played offensive tackle in college and allowed six sacks over a two-year career with UC-Davis.
"He did a nice job for us and has made real good progress," head coach Marty Schottenheimer said. "He is very versatile. He has real good length and athletic ability to recover when that becomes necessary. He can play left side or right side."
Ben Johnson will slot behind him in the rotation, moving over from his right tackle spot.
As for McNeill, he will have to practice to play and Schottenheimer expects to wear a cast for the next few weeks, creating some urgency that he line up so he knows how to respond with the cast on.
"He will have to know how to manage with the cast on," said Schottenheimer.
Scott Mruczkowski could also be called upon on the outside, although he has not practiced or played anywhere but on the interior of the line.
With the critical left tackle spot up in the air, don't expect a Philip Rivers sighting. From an injury standpoint, the Chargers can ill-afford putting their starting quarterback under the gun without a competent option on the blindside.
"Left tackle is an important part of the offensive line from a protection standpoint," Schottenheimer agreed. "We have had three get injured. We will have someone plug back in there – Lekkerkerker has made a lot of progress over one season. If we have to we will put Brandon Manumaleuna over there and they will double-team the guy."
Donnie Edwards returned to practice and is expected to play against San Francisco this week. He tallied an interception in Monday's practice.
Fifth round pick Kurt Smith was released by the club. The Chargers had hoped he could boom kickoffs deep enough to make a positive impact. There wasn't, according to Schottenheimer, a noticeable difference between Smith and Kaeding.
"I thought he did a nice job in the kickoff – he needs to continue to work on field goals and/or punting," said Schottenheimer. "If he does that he is no longer a specialist. There has to be a dramatic difference to warrant the roster spot."