The Bengals have a need at guard after losing Nate Livings in free agency and Bobbie Williams' contract expiring so this is an obvious need. Glenn comes from an SEC school where he played some of the best competition in college football. A solid pick.
SB Nation's Bengals blog, Cincy Jungle, explains the pick:
Heading into the 2012 season, one of the biggest needs for the Bengals was at guard. They lost Nate Livings and Mike McGlynn in free agency (which nobody is complaining about) and Bobbie Williams' contract is up. They addressed the position by signing free agent Travelle Wharton, who will likely start at left guard, but they still need help at right guard. Cordy Glenn could jump in and start from day one and give the Bengals one of the better offensive lines they've had in the last few years. If that offensive line could keep Andy Dalton protected and open holes for BenJarvus Green-Ellis, the Bengals could find themselves pushing for a spot in the playoffs again in 2012.