The reshuffled offensive line, which was solid the first three games of the season, has recently shown cracks as the Ravens have allowed four sacks in three of the past four games. Left guard Bobbie Williams, who replaced Ramon Harewood in Week 6, was beat for two sacks Sunday. With quarterback Joe Flacco taking too many hits, Harbaugh is receptive to making changes. "We'd like to have five guys who are rock solid and who are in there and working with everybody all the time," he said. "It's really just not where we're at right now. So, let's make the best of it and let's work some guys in there. If we get hot with a group, then we'll stick with it." The Ravens may consider going back to Harewood or plugging second-year lineman Jah Reid in at left guard. Another option is inserting Bryant McKinnie at left tackle and moving Michael Oher to right tackle and Kelechi Osemele to guard, but McKinnie's ability to stay healthy is a concern and his play in practice recently hasn't been good enough to warrant a switch -- yet.