There is no mention of 3-cone at this link, but he seems to be reasonably athletic.
"LINCOLN — Former Nebraska linebacker Will Compton wore the biggest smile of all the Huskers working out at Thursday's Pro Day. He ran a 4.54 40-yard dash, jumped 32 inches in the vertical, more than nine feet in the broad jump, and finished with 24 repetitions in the 225-pound bench press. Of the 15 scouts on hand, Compton said, several had strong feedback."
http://www.omaha.com/huskers/notes-compton-s-stock-rises-at-pro-day/article_04d686a2-997d-5f2d-8328-077a36d7335d.html
Also, was a Team Captain his senior year.