C Sean Pollard
Just like with Colon-Castillo, any center is going to at least be in competition for a roster spot thanks to the questionable depth at the position. However, Pollard has a leg up here given his experience at center, guard, and tackle. Baltimore absolutely loves versatility from their offensive linemen and they tend to lean towards backups that can play multiple positions decently rather than a guy that plays just one spot well.
Pollard is kinda the opposite of Colon-Castillo in playstyle and build, being quicker than strong and having longer arms. As a pretty polished player, Pollard has a high ceiling if he can add more strength. That upside is exciting, especially at a position that doesn’t have a legacy player already.