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The University at Buffalo's Khalil Mack stacks up with elite NFL performers as a physical specimen. That's no surprise, but that's what his NFL Scouting Combine numbers showed on Monday.

Mack weighed in at 251 pounds. His numbers: 4.65 seconds in the 40, 40-inch vertical jump, 128-inch broad jump, 7.08 3-cone, 4.18 shuttle.

Denver's Von Miller, the second pick in 2011, weighed 246 pounds at the combine. He has proven to be an elite edge-rushing linebacker.

Miller's numbers: 4.42 in the 40, 37-inch vertical jump, 126-inch broad jump, 6.70 cone, 4.06 shuttle.

Green Bay's Clay Matthews was a 240-pound first-rounder in 2009. He ran 4.62 and did 35.5, 121, 6.84 and 4.22.

Buffalo's Jerry Hughes was a 255-pound first-rounder in 2010. He ran 4.65 and did 34.5, 118, 6.99 and 4.15. Hughes, of course, didn't have instant success like Miller and Matthews. But it's interesting to see how well he tested coming out of Texas Christian.