Barrow earned second-team All-SEC honors from the Associated Press and coaches after his senior season, when he led LSU in tackles.
In his collegiate career, the 6-foot-1, 237-pounder played in 51 games with 28 starts. He finished with 230 tackles, 14.5 tackles for loss and 1.5 sacks, adding seven pass breakups, seven quarterback hurries and four fumble recoveries.
At the NFL Scouting Combine, Barrow said he brings "physicality, tougness and speed" to the next level, which are traits teams recognized during interviews.
"I think his football character, what he brings to the table and his mindset," Head Coach John Fox said during the draft. "We look at guys that made captains and what they’ve brought to a big-time program even in college, and been in big spots, been in big games. Of course, he’s a very explosive guy that can play all three downs as a linebacker early in his career."