Harbaugh has made it clear that the Ravens believe that Lewis' best position, both now and in the future, is left guard and in a perfect world, they'd prefer keeping him there. They think he'll develop into a Pro Bowl-caliber guard. Lewis got limited repetitions at right tackle during practices last season. He also replaced injured left tackle Stanley in a few games. He didn't look as comfortable or as physical at tackle as he did at guard but that's understandable. If he played right tackle through summer minicamps and then training camp, maybe that changes.