4 lineman worked out - the top guard in the draft - Duke Robinson, Loadholt - a tackle, a center - Cooper, and a later round guard - Walker.
http://blogs.nfl.com/2009/03/10/oklahomas-...eral-standouts/
Four offensive linemen who have NFL potential worked out in Norman. Phil Loadholt (6-7 7/8, 332 pounds), Duke Robinson (6-5 1/4, 330 pounds), Jon Cooper (6-2 1/8, 290 pounds) and Brandon Walker (6-2 7/8, 306 pounds) drew three offensive line coaches to the pro day — Detroit’s Pat Morris, Buffalo’s Sean Kugler and Miami’s Dave DeGuglielmo. Vikings head coach Brad Childress and vice president of player personnel Rick Spielman also were there.
Loadholt looked very good in his positional drills. His workout-drill numbers were as follows: 5.45 seconds in the 40-yard dash twice, a 28 1/2-inch vertical jump, a 8-9 broad jump, a 4.77-second short shuttle, a 8.14-second three-cone drill and 26 bench-press repetitions (though it should be taken into account that it is harder for a tall player with long arms to throw up the bar).
Robinson stood on his 40 times from the combine, posted a 31 1/2-inch vertical, a 8-3 broad jump and a 5.0-second short shuttle, and put up 20 bench-press reps.
Cooper, who is a very good player despite his slender frame (for a center), ran a 5.0 flat and 5.03 in the 40, had a 31 1/2-inch vertical jump, an 8-9 broad jump, a 4.50-second short shuttle and a 7.43-second three-cone drill, and posted 32 bench-press lifts.
Walker had a 34 1/2-inch vertical jump and a 9-2 broad jump, and he ran a 5.18-second 40. He also had a 4.88-second short shuttle and an 8.20-second three-cone drill, and he stood on his bench-press reps from the combine.