Mel Kiper Jr., ESPN: 1st rated C, 87th player overall, 3rd-4th round projection. Assisting him moving forward into the NFL will be his smarts and his ability to handle being the leader of the offensive line. He has the dual versatility to help a team at C or G and he comes out of a program that has supplied NFL teams with a lot of quality offensive linemen over the years. - Nolan Nawrocki, Pro Football Weekly: 1st rated C, 9th overall rated OL, 48th player overall, 2nd-3rd round projection. Started final 27 games of college at G and C, showing versatility and experience. Large, physical, short-area blocker who can wall off with NFL strength. Would be the biggest C in the league and may project to a G in a power-based blocking scheme. Shed weight prior to the combine. - Frank Coyle, Draft Insiders Digest: 2nd rated C, 60th player overall, 3rd round projection. Tough saavy pivotman with experience vs. top competition in a physical conference. His fine intangibles and leadership skills combined with his skill set and size gives him a starting grade early in his career. Fine technician with good wrestling background. Marginal top 75 prospect with the talent to be a reliable starter with the work ethic to get the most out of his athleticism. Durable saavy starting center. - Scouts Inc., ESPN: 1st rated C, 70th player overall, 3rd round projection. Frederick is a nasty, versatile interior lineman who also has experience at G. He is an effective hand-fighter who locks on and has the power base to create movement once in position. In terms of pass protection, he can anchor against power and masks his athletic limitations with sound footwork. It should also come as no surprise that a Wisconsin offensive lineman who can play multiple positions has great football I.Q. and rarely loses because of mental mistakes. - Rob Rang, NFL Draft Scout: 1st rated C, 56th player overall, 2nd round projection. Top-notch football I.Q. and overall intelligence to recognize what the defense is doing and adjust the line. Has bulked up and added to his frame, carrying his weight well for a 335-plus pounder. Mobile enough to get to the second level and block in space. Works hard with his technique and doesn't make many mistakes. Fights with a finishing attitude. Lacks elite athleticism and has some stiffness in his hips.