UCLA linebacker Anthony Barr was far from the player with the most to prove at Tuesday's UCLA Pro Timing Day, but the way he attacked each drill you would never know.

The big news out of Westwood is that the potential top-10 pick likely solidified that status with a 4.45 40-yard dash time - an improvement of .22 since the NFL Combine two weeks ago. He also benched more reps, improved his broad jump and showed why he's one of the most coveted players in the 2014 NFL Draft.

The debate continues to rage on whether it's Barr or Buffalo's Khalil Mack at the top of this year's linebacker class and the improvements both have made since the combine did little to fan the flames.

"After he came back from the combine he went back to work coach (Sal) Alosi and made some huge gains," Mora said. "I think definitely in the top-10 from what I got from the guys today. And they understand with Anthony that the ceiling is so high, he's only been playing the position for two years."

Alosi, a noted football specialist with as much NFL experience as the rest of Jim Mora's pro-heavy staff, put Barr through a brutal two weeks but the work clearly showed.

"He comes out here today and runs a 4.45, at 247 pounds, 6-foot-4 1/2. And then he goes out and benches 19 times which is a four rep-improvement from two weeks ago and they understand that there's so much room for growth," Mora said.