So serious that it will sideline Keller for the entire 2013 season .
The knee injury to starting tight end Dustin Keller at first glance appeared to be serious and after a MRI on Saturday night , it was confirmed to be serious .
So serious that it will sideline tight end for the entire 2013 season .
The knee injury to starting tight end Dustin Keller at first glance appeared to be serious and after a MRI on Saturday night , it was confirmed to be serious .