Scouting Report:
STRENGTHS - Strong and powerful, Frederick consistently shows ability to "get a good fit" on DT and is able to keep DT pinned on LOS in pass pro. Although his 40 time is terrible, he is quick out of stance to set-up and make contact with DL. He does a good job of bending knees and pass blocking with good base/leverage, which allows him to slide well side to side to maintain in pass pro. Once he gets ahold of DT he has the strength and technique to consistently maintain his pass blocks. He does a good job of getting off the ball quickly on in-line run blocks, makes contact with good leverage and can pin/seal DL to the side of the play to open the inside hole. For a player who ran such a bad 40, he is surprisingly effective making short pull and lead blocking LB in the hole. In addition, he is effective chipping DT and stepping through the LOS to seal block LB to the side of the play. He has experience starting at both guard and center, so versatility is definitely a plus.

WEAKNESSES - Frederick is not a top athlete and while he can effectively make short pull, he lacks speed to get outside the OT to lead block on outside runs. Despite showing the ability to set-up quickly in pass pro, he is late at times getting his hands on DT, which allows explosive off the ball DT's to get into gaps to get backfield penetration before he is set. While he is productive blocking in space when defender is on his track, he lacks the quickness and athleticism to adjust off track to block a moving target out in space consistently.

SUMMARY - Having played guard most of 2011 (Except when he filled in for Peter Konz when he was injured), Frederick switched to center in 2012 after Konz graduated and was much more effective there. While he weighed 312 at the Combine, he played in the high 320's/low 330's at Wisconsin and definitely is at his best when at that weight as it gives him the size and playing strength to physically tie up and control DT. He is never going to be able to adjust to block effectively out in space and will have trouble dealing with explosive off the ball gap shooting DT's due to his lack of top athleticism. Overall, Frederick is being downgraded because of a bad 40 time at the Combine, but he is a good center prospect with the talent to be a solid, workmanlike starter in the NFL who is able to physically control man once he locks up on them. He would be an excellent fit for a team like the Ravens. .

Scouting Report:
STRENGTHS - Schwenke is a solid all-around offensive lineman who has been productive starting at center and has the ability to play guard also. He uses his hands well to lock on and tie up defenders, both on the defensive line and in the second level. He works well with the guard in tandem-blocks and then can slip free and get to second level to seal block the linebacker out of the play. He has quick feet and shows good footwork in pass-protection and it helps him to slide side-to-side to stay on blocks through the play.

WEAKNESSES - On tape, Schwenke has really good initial quickness, but he lacks power and even though he makes first contact, defensive tackles get their hands on him and can bully him. He needs to do a better job of setting up quickly with a good base and leverage because when he doesn't, he doesn't play to any strength at all. Too often he gets his feet close together and he ends up with a narrow base, which allows defensive linemen to jolt him off balance and defeat his block. He needs to do a better job of keeping his head up in pass-protection so that he can stay engaged. He doesn't play strong.

SUMMARY - He began his career as a left guard, but moved to center for his final season at California. He shows the flexibility to bend knees and sink hips to pass block with good leverage. When he blocks with good base he can slide well side-to-side to pick-up different defensive line stunts and blitzes. When he doesn't play with a good base, he gets pushed around. If he is going to make it at the NFL level where he has to compete against stronger athletes, he is going to have to get into the weight room to get stronger, as his lack of strength shows, and it nullifies his quickness. Schwenke is a good prospect, but will still need time to develop into a starting interior lineman. His short arm length and lack of functional strength makes him a player who can only play center now, but with some added strength he could play guard with some seasoning. In time, he should develop into a decent starting center and adequate backup guard as long as he continues to get stronger. He warrants fourth-round consideration as a player with some upside in a few years.

Scouting Report:
STRENGTHS - Turnley is a solid all-around offensive linemen who has been productive starting at center and has the ability to play guard also. He has a thick build and the playing strength to anchor vs. pass rushers and lock on and turn DL out of the play on in-line run blocks. He uses hands well to lock on and tie up LB's on the 2nd level. He has good footwork in pass pro and it helps him to slide well side to side to stay on and maintain blocks. He has the footwork to pull to the second level of the defense.

WEAKNESSES - Blake is average when it comes to initial quickness, which allows explosive defensive tackles to get their hands on him first too often. He needs to do a better job of setting up quickly with a good base and leverage because doesn't always play up to his natural strength. He is constantly pulling in the Panthers offense and needs to do a better job of finding someone to block. He whiffs on blocks at times. He needs to do a better job of keeping his head up in pass protection so that he can deliver a good initial punch first, and not the other way around. He has had nagging foot injuries.

SUMMARY - Turnley began his career as a backup left guard, but moved to center for his final two seasons at Pittsburgh. On film he shows the flexibility to bend knees and sink hips to pass block with good base/leverage. When he blocks with good base he can slide well side to side to pick-up different DL stunts and blitzes. If he is going to make it at the NFL level where he has to compete against better athletes, he is going to need to be more consistent at setting up quickly and blocking with good base/leverage. Overall, Turnley is one of the top senior center prospects of this class, but will still need time to develop into a starting interior lineman. His ability to play center and guard makes him a nice late-round selection and gives him time to develop. In time he should develop into a very good backup center and adequate fill-in starter. Turnley warrants a sixth/seventh round grade in the 2013 NFL draft.

Scouting Report:
STRENGTHS - Schwartzstein has average size with some limited growth potential to add for the position at the next level. He shows above average overall athletic ability and body control in his play. He is a competitive player, who shows consistent effort to finish his blocks, and is most effective on traps and down blocks in the running game. He is a solid in-line blocker who holds his ground. In passing situations, Schwarzstein is adequate considering he is a small interior lineman. He gets up and out of his stance quickly and plays with good pad level, and shows a strong punch when he uses his hands. He isn't the most nimble player but can get to the second level and use his body to shield defenders away from the ball carrier. He appears to be a tough, smart player who hasn't missed much time during his two years as the starting center for Stanford.

WEAKNESSES - Schwartzstein is an adequate blocker in the passing game but not a player who can be relied on to stay on powerful interior defenders for long periods as he lacks good playing strength. He doesn't exhibit great body balance and agility when he gets physically locked on to a defender. Out in space he tends to miss moving targets and while he holds his ground at the line of scrimmage, he doesn't gain any leverage and lacks the power to move anyone off the ball. While he can initially deliver a jolt to a defensive lineman, there isn't much behind it and he loses ground. Schwarzstein doesn't have great functional strength and appears to have short arms as well. He doesn't have much foot quickness and can get beat to points on the field out in space.

SUMMARY - Sam Scwartzstein is a polished center prospect with average size and some ability to get bigger for the position in the NFL. He is a solid athlete with good instincts in how to use position and leverage to his gain. He is a competitive football player who goes whistle to whistle and plays with toughness. However, he lacks good playing strength and doesn't create much push in short yardage situations. He is at his best in tandem situations where he can play a two man game with the guard next to him. He can get to the second level and get his body in the way, but he doesn't always make contact and can miss on moving targets. He tends to get overwhelmed when playing through contact and the lack of power really shows when he is playing bigger, more powerful interior linemen. While he has been very productive over the past two years at Stanford, he doesn't possess great foot quickness or superior functional strength and simply struggles against power. Overall, he will have a hard time against the bigger bodies in the NFL, but warrants seventh-round or priority free agent consideration due to growth potential, smarts and competes.

Scouting Report:
STRENGTHS - A smart player who has been the leader of USC's offensive line, he has no trouble handling making the protection calls and getting the OL set properly to block. Quick out of stance, Holmes is able to get set-up in good blocking position fast. Able to bend knees and sink hips, he can block, both run and pass, with good leverage. He shows his awareness/instincts helping the other linemen when he does not have a man to block and can switch off with other linemen to adjust to DL stunts/games/blitzes. An extremely tough player, Holmes battled through a painful, nagging knee injury to stay in the lineup in 2012 even though his play clearly suffered. He can get through the LOS to the second level, both when uncovered and when he has to work around a DT, quickly and does a good job of blocking with base/leverage to tie up and eliminate LB from the play. He is a definite team leader with VG intangibles.

WEAKNESSES - Holmes is the classic over-achiever who lacks the tools NFL teams ideally want in a starting center. Although his height/weight measureables are fine, he does not play up to it, as he can be jolted and driven backwards way too easily. On straight ahead run blocks, DT's are able to jolt him upright, can drive him backwards and are able to shed and disrupt/make the play behind the LOS. Despite his ability to set-up quickly with good leverage in pass pro, Holmes gets driven backwards in the QB's by bull rushers way too often. While he is effective stepping through the LOS to block on the second level, he lacks the quickness and speed to pull and get outside to block effectively on outside runs. More than anything, Holmes is a limited athlete who lacks good enough playing strength to make up for it.

SUMMARY - I was disappointed when I evaluated Holmes because I expected him to be a better player than he proved to be. An extremely smart linemen who does an excellent job of making the protection calls and gets the linemen in the right position, Holmes is limited by a lack of good playing strength and athleticism. Overall, I would not draft Holmes until very late because I do not think he can be a productive starter in the NFL. However, many smart college centers with as much starting experience as Holmes end up carving out careers as long term backups, which is why in the 6th or 7th round he is worth consideration.