When constructing their 53-man roster, the Cincinnati Bengals offensive line tends to include several players with experience at multiple position.
With only 53 spots available and eight to nine of them able to be afforded to big uglies, it's critical to have versatile players who can play different positions throughout a 16-game regular season. That's even more true of those final few backup players who make the team.
Guys like T.J. Johnson, Scott Kooistra, Dennis Roland and Mike McGlynn have made the roster in recent years not because they played one position that well, but because they offered the ability to be backups at multiple spots along the line.