A closer look at the positions the Detroit Lions could target at the NFL combine in Indianapolis.

Positions of need: The Lions need to add depth or potentially upgraded starters at pretty much every position on the roster other than kicker and punter. They'll focus a bit more on some spots than others, though. Detroit general manager Bob Quinn made it clear after the season that the Lions need to fix the run game. Whether that means continuing to overhaul the offensive line or bringing in a different kind of running back remains to be seen. Detroit’s front seven also needs improvement; the Lions struggled to create any sort of pass rush for the majority of the season. While those three spots -- offensive and defensive line along with linebacker -- will get the majority of attention, Detroit needs to bolster depth at receiver and in the secondary. Tight end, depending on what the Lions decide to do with Eric Ebron, could become a major need. In other words, expect Detroit to investigate a bunch of players at the combine and then have a narrower positional focal point following free agency.

Players the Lions could focus on at the combine:

Derek Barnett, DE, Tennessee: Barnett would give the Lions a potentially productive pass-rusher to pair with Ezekiel Ansah. Barnett set the Tennessee sacks record (33), snapping the mark set by Reggie White. He was able to get into the backfield often with 52 career tackles for loss, second-most in Tennessee history behind Leonard Little. It was consistent production as well, with 10 sacks in both his freshman and sophomore years and 13 as a junior. All three seasons also had double-digit tackles for loss.

Marlon Humphrey, CB, Alabama: He has high-level track speed and would give Detroit a boost of athleticism in the secondary, and at 6-foot-1, he has the height that Lions defensive coordinator Teryl Austin prefers in his cornerbacks. He had only two interceptions in 2016, but he also broke up five passes. He started every game he played in his Alabama career and was a first-team All-American by the FWAA.

Ryan Ramczyk, OT, Wisconsin: The Lions could be reconstructing the right side of their offensive line, and Ramczyk could be a fit. He could eventually push Taylor Decker on the left side, but it would give Detroit two strong building blocks up front. At 6-foot-6, 314 pounds, he has good size at the position as well and played in a system at Wisconsin that typically produces strong offensive linemen.

Haason Reddick, LB, Temple: He’s a future three-down linebacker who could offer Detroit's linebacker group the speed and versatility it is currently lacking. At 6-2, 237 pounds, he could fit well as an outside linebacker for the Lions. While he had only 147 career tackles, he moved around during his college career, and that could benefit him in the pros. He had 18 career sacks, though, and is second in Temple history in tackles for loss. After playing safety in high school, he played defensive line and linebacker in college.

Jake Butt, TE, Michigan: Butt is an intriguing case, because he’d be a potential first-round pick had he not torn his ACL in the Orange Bowl. If he’s available in the third or fourth round, the Lions should absolutely consider him, provided there are good reports on his knee. Butt is a pass-catching dynamo who could help open up Detroit’s offense and would offer flexibility with two-tight end sets. If the Lions were to move on from Ebron, he could be a long-term answer there, too. Michael Roberts, from Toledo, could be a good option as a mid-round blocking tight end.