Of all the losses after the Super Bowl, the retirement of starting center Matt Birk might have had the biggest impact. Gradkowski, a 2012 fourth-round pick, struggled to fill Birk's big cleats in 2013 and was the NFL's lowest-graded center in the eyes of Pro Football Focus. Gradkowski struggled to hold up physically and must continue to get bigger and stronger to hold on to his job. But whether it is Gradkowski, 2013 rookie Ryan Jensen or a player who isn't on the roster, someone needs to step up at center in 2014.
Christopher T. Assaf, Baltimore Sun