Alabama offensive tackle Cyrus Kouandjio had a rough day, running the slowest 40-yard dash time among offensive tackles (5.59 seconds). The DeMatha Catholic graduate also bench pressed 225 pounds only 21 times, second-fewest at his position. His draft stock may also take a hit due to concerns about an arthritic knee, according to NFL sources. ... North Carolina tight end Eric Ebron ran a 4.6-second 40-yard dash after incorrectly predicting that he would beat Cincinnati Bengals and former Tar Heels running back Giovani Bernard's time of 4.53 from last year. ... Michigan offensive tackle Taylor Lewan and Auburn offensive tackle Greg Robinson cemented their high first-round status with impressive workouts. Neither player is expected to be available when the Ravens pick at No. 17 in the first round. Lewan ran the 40-yard dash in 4.87 seconds, the fastest time for an offensive lineman, and also had the best broad jump at 9 feet, 9 inches. Robinson ran a 4.92 in the 40-yard dash and is 6 foot 5, 332 pounds. ... Ravens general manager Newsome said he watched Towson running back Terrance West run roughshod against Eastern Washington, but has yet to thoroughly study him. "I don't do TV scouting," Newsome said with a laugh. "I leave that to you guys [reporters]."