Boston College Senior
Has good size and long arms. Has a nice punch and gets good extension on the edge, initiated contact. Shows ability to lock on in pass protection. Sets up quickly and is a natural knee bender. Has the footwork and athleticism to mirror speed on the outside and can adjust well in space. Can cut block. Has good pop and is able to get position as a run blocker. Is able to wall off defender to get the seal on the edge. Does a good job finishing his blocks and playing to the whistle.
Doesn't always do a great job initiating contact with a good punch on the edge. That allows defenders to get around the corner. Will whiff at times when facing the quick, inside counter move and also will set up too wide or deep in his set. Too often lets defenders get their hands on him. Susceptible to the bull rush for that very reason and doesn't have great strength. Lack of strength limits how much push he can get as a run blocker. Needs to take better angles out on the edge and will take a false step off the snap as a run blocker. Doesn't do a great job locking on as a run blocker, and doesn't give you much as a drive blocker.
Castonzo is a talented pass protector that has the size, arms, footwork, and technique to hold up well at the next level. He is a four-year starter that came to Boston College as a 270-pound freshman starter. That year, he played right tackle during Matt Ryan's senior year. He has since bulked up and manned the left tackle spot the past three seasons. Started 54 career games
I think Castonzo fits best in a zone blocking scheme. With his superior technique and footwork and the fact that he's isn't a road grader, he can come in right away and be able to produce in that scheme. He can also play in a man blocking scheme, but I don't think unless he puts on some more muscle, is he going to be a guy that can really generate the push as a run blocker to excel in that scheme. But the primary value of Castonzo will be in pass protection. He's probably going to struggle somewhat as a rookie starter on the left side, but he has the toughness, smarts, and intangibles to work through it. The question becomes how good a pro left tackle is he going to be. The best comparison I could give him is a smaller, more finesse version of Jake Long. He can be a good starter, but I don't see him as an elite left tackle because he's not going to be a great run blocker. I also think he'll struggle against the premier pass rushers, especially those that have a good bull rush because he struggled with that at Boston College. He's good enough to start right away, but he's a guy that may take the better part of two or three years before he starts to come into his own. I think he'll be more competent than good, and he'll wind up being compared more with the Joe Staleys and Sam Bakers of the league rather than the Jake Longs and Joe Thomases.
Castonzo has the potential to be an upgrade at left tackle in pass protection because he probably has better tools with his size and longer arms than Sam Baker. He also has the potential to be a better run blocker as well for similar reasons due to his size potential being able to support upwards of 325 pounds. But like Baker, he's not a great fit in Atlanta because he'll be a limited run blocker in their man-heavy blocking scheme. With development and adding muscle, he can be better there, but he's not the type of guy that is going to be a guy that consistently wins one on one matchups on the outside. In the end, he's probably a guy that can come in right away and push Baker for his starting job, but not a good candidate to win it. He can sit for a year or two, and then if he develops he can replace Baker on the outside if Baker doesn't progress from this point forward. He would make a nice swing tackle for immediate depth, but there is no guarantee that he would earn a starting position at some point in his first two years.
Castonzo's potential is probably more in line with early second round talent, but because of the premium teams place at left tackle, it pushes him into the latter part of the first round where he won't be a reach if he's not taken in the Top 25.
1-poor, 2-weak, 3-above average, 4-very good, 5-elite
Pass Blocking: 4.0
Run Blocking: 3.0
Mean Streak: 3.5
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