Nebraska's Randy Gregory spends time at LB during pro day Gregory didn't run the 40-yard-dash Thursday and instead focused on drills he hopes show off his versatility. Gregory, who met with team representatives immediately after the pro day ended, said some are talking to him about playing linebacker in 3-4 systems and defensive end for 4-3 teams. Huskers running back Ameer Abdullah came to the pro day hoping to improve the 4.6-second 40-yard-dash time he ran at the NFL combine in Indianapolis. Abdullah said he went to Indianapolis expecting to be the top running back and he says that carries beyond the drills and tests.