I pointed this out a few weeks ago when Walter had Steelers drafting ILB in the first. DL or TE would be in play as well. They could do with a really dominant NT, and depending on how they view Jesse James long term then they could be looking for Heath Millers successor.
Summary: Anthony Castonzo hails from Offensive Line U. OK, no one really calls Boston College that, but maybe they should. The school is a factory for NFL linemen and obviously the coaching is a big part of that.
On this note, Castonzo uses finesse and technique to his advantage. His upside is in adding a few pounds and more strength. This would make him a better run blocker and more able to slow down powerful NFL rushers.
Off the field, Castonzo has thought beyond his pro career even before it has started. He plans to pursue cancer research, inspired by teammate Mark Herzlich who has beaten cancer himself.
Player Comparison: Sam Baker. The connection here isn't based on their Combine results because the only thing Baker did was the bench press, but his total (28) matched Castonzo's for what that is worth. Neither player is fleet of foot and both had four years of starting experience. Baker was considered a great zone-blocking scheme fit coming out, needing to bulk up, and the same now applies to Castonzo.