Draft risers from Day 1 of the NFL combine

North Carolina RB T.J. Logan showed off great speed on Friday. Brian Spurlock/USA TODAY Sports

INDIANAPOLIS -- Offensive linemen and running backs were put through the gauntlet on Day 1 of drills at the NFL combine. Here's who helped their stock the most with their testing results.

T.J. Logan, RB, North Carolina

Logan caught some eyes Friday by recording the lone sub-4.4 40 time of the running back group (4.37), while also coming in the top 10 for the broad jump (10 feet, 1 inch). At 5-foot-9 and 196 pounds, the undersized back also recorded a respectable 17 reps on the bench test and showcased quick lateral agility and acceleration during drill work. Logan is polished as a receiver in the passing game, and while he had an uncharacteristic drop during drills, overall he displayed quality body control and hand-eye coordination catching the ball, which matches up with his tape. In a deep running back class, Logan is an under-the-radar Day 3 prospect whose speed gives him a chance to be a change-of-pace RB and a returner on special teams (two kickoff return TDs in 2016).