The Buffs return either six or ten starters on defense (depending on whether you read Athlon ... or look at the actual roster). The defensive line is the shakiest unit on the team, but the linebackers and defensive backfield could be bolstered by transfers ... and, if Nate Landman can return this fall at full speed, this could be a stout defense. This will be the first set of spring practices for CU head coach Karl Dorrell and his staff, with Buff fans excited for continued improvement from the roster.