Haden's hips look a bit tight

Editor's note: All 40-yard dash times listed below are unofficial unless otherwise noted. Scouts Inc.'s daily combine buzz will include as many official numbers as possible and expanded takes on players mentioned in the blog.

• Florida cornerback Joe Haden did a nice job of sinking his hips, exploding out of his backpedal and catching the ball during cone work. However, he didn't look as fluid or smooth as anticipated when asked to open up his hips and turn and run earlier in the workout.

After what teams have seen, including a disappointing 40-yard dash time, they must go back to the film to see whether Haden is more vulnerable to getting beat over the top than originally thought.

• Boise State CB Kyle Wilson will not run the 40 or participate in any of the drills because of a strained hamstring. It's another disappointing injury for a top defensive back, but Wilson has some momentum built up after a great Senior Bowl week and is expected to run at Boise State's pro day on March 26.

• The safeties clearly had a difficult time catching the ball when asked to open their hips and track it downfield. Tennessee's Eric Berry uncharacteristically double-caught one ball, but at least he hauled it in. Virginia Tech's Kam Chancellor, Toledo's Barry Church, Ohio State's Kurt Coleman and LSU's Chad Jones each had a ball bounce off their hands.

• Clemson's Crezdon Butler and Vanderbilt's Myron Lewis both appeared stiff in space and struggled to flip their hips when asked to change directions while backpedaling. At 6-foot-1¾ and 203 pounds, Lewis might be a better fit at safety but could play corner for a base Cover 2 team. Butler, however, weighed in at 191 pounds and measured 5-11⅛, so he doesn't have great size for a safety or a Cover 2 corner.