I'm going to assume his recovery from getting his knee scoped wasn't going so well, or he knew that Brandyn Dombrowski wasn't about to lose the starting LT job, because Tra Thomas has retired.
Without Marcus McNeill returning anytime soon, this leaves the Chargers with only Dombrowski, Tyronne Green (who moved to OT this offseason) and Nick Richmond (a very raw rookie) as the only options at tackle. Expect the team to either start negotiations with McNeill or sign another veteran like Thomas in the next week or so.