What do you think of Cam Dantzler he's also sliding because of poor testing numbers but I still really like him because of his tape where he looks much faster than his combine suggests.
I'm not entirely sure.
That 4.64 run at the Combine showed a guy very slow out of the blocks. Then again, there's a reported 4.38 at his Pro Day. Delpit, one of the top safety prospects who didn't run at the Combine because of an ankle sprain, put up a 4.39 on the same field. It's a bit strange since Dantzler sat out his bowl game purportedly to train for the the Combine. He was a high school long jump champion at 23', about the same as Nelson's high school long jump. You don't do that without some 17-18 year old sprinter speed and explosiveness. All in all, I'd be inclined to discount that 4.64 given the Pro Day and a more mature body than his high school 170 lbs. that made that long jump.
Still, he's very skinny, and with that narrow shoulder build he's probably limited in how much good weight he can put on. That 188 lbs. at 6' 2" is an issue. He looks like a skinny point guard.
The highlight tapes I looked at shows him making a lot of plays on bad throws, tipped balls or double teams in the short-to-intermediate range. In the following full-game cut up against Alabama in 2018, he was not thrown at even once, though without counting it seems some plays were cut out. It's hard to tell without coaches tape whether that's a function of shutting guys down or regular top-side help.
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I'd want to see a couple of instances where he's running the deep sidelines in man to see what he does, speed-wise and technique, flip-and-run, handle a double move, adjust to the ball, whatnot. Zierlein says his LSU and Alabama tapes were impressive, so there's that.
Based on limited info, I'd say his build is more a concern than anything else. Maybe he'd work out to be a perimeter coverage corner if you're not all that concerned with run support against bigger and meaner NFL players and you're willing to discount injury risk.