According to Aaron Wilson, free agent veteran guard Mike Pollak worked out for the Cincinnati Bengals on Wednesday, though a contract wasn't "immediately signed". Pollak spent four seasons with the Indianapolis Colts, drafted in the second round of the 2008 NFL Draft. He played one game with the Carolina Panthers last season.
We're not going to file this under the "we're planning to release Travelle Wharton soon, so we need a body to replace him" file. It's possible that they could be looking for a second backup offensive guard, but even that doesn't settle. Even if they release Wharton, backup options include Dennis Roland, Anthony Collins and even Trevor Robinson, who played guard at Notre Dame. Then again Roland and Collins would be more defined as emergency options to fill in a pinch.
On the other hand Pollak is a former Rimington Trophy finalist while at Arizona State, which is given to the best centers in the country. And we know well that if the Bengals place a premium on versatility.