2015 Undrafted Free Agents: Examining Best Players Available Following NFL Draft

The 2015 NFL draft came and went, and even after 256 picks and rookie undrafted free agents committing to teams in droves, the roster building is not over, nor has the well of collegiate talent run dry.

NFL.com has a roundup of all the undrafted free-agent deals completed thus far, and if you follow that link, you will see a bevy of players have already reportedly found NFL homes (for the summer, at least).

Even after the initial swarm of signings, there are still pockets of as-yet untapped talent available. It's likely slim pickings at this point, but here are three players—one of them whose football ability has never been in question—who could still make their way to a training camp this summer.

La'el Collins, OL, LSU

David Quinn/Associated Press

La'el Collins is the obvious prize of the 2015 undrafted free-agent class, and he would have nothing to do with this group if it weren't for his connection to a pending off-field investigation.

A bruising guard with a mean streak, Collins has the ability to be a top-tier run blocker in the NFL someday. NFL Network's Ian Rapoport reported that Collins won't sign until at least Monday, which might be enough time for teams to assess the viability of adding Collins to their roster. 

If there is room for Collins in the NFL, it will have to come as a free agent. CBS Sports' Dane Brugler noted Collins cannot enter the 2016 draft: "Collins is a first-round talent, but because of his connection with an off-field incident, he is now a free agent and cannot enter the 2016 NFL draft."

His saga has been of the strangest in recent memory, but if he checks out with the NFL, Collins will be snapped up in no time and has the talent to become one of the better undrafted free agents of all time.

Brandon Bridge, QB, South Alabama

David J. Phillip/Associated Press

2015 was an underwhelming year for quarterbacks, with only Jameis Winston and Marcus Mariota deemed worthy of major, first-round investments. With the class beyond those two such a mixed, inscrutable bag of players, it stands to reason someone with the raw ability of South Alabama's Brandon Bridge might get a shot this summer.

While there were whispers Brandon Bridge had signed with the Detroit Lions, Bleacher Report's Brad Gagnon noted it might not be a done deal:

Bridge threw for 1,927 yards, 15 touchdowns and eight interceptions from 2013-14. Those are solid numbers, but they came at a paltry 52.1 percent completion rate.

While his arm strength isn't in question, it appears possible he can develop pro-level accuracy with a fix to his mechanics. 

"He can throw it through a wall, but who knows if he can throw it right to me standing 15 yards away. Hard to get drafted when you can't complete passes. I will be interested to see if our quarterback coach thinks those mechanics are fixable," said an AFC South scout, per NFL.com's Lance Zierlein.

If there is a team willing to work with him and give him time to develop, likely on the practice squad, Bridge should garner a shot in the NFL.

Davon Walls, DT, Lincoln

Lincoln University of Missouri isn't necessarily the first place an NFL scout might look when searching for help on the defensive line, but there could be a hidden gem there in Davon Walls.

Once a member of Syracuse, Walls was kicked off the team in 2013 early in coach Scott Shafer's tenure for his involvement in a burglary, per Syracuse.com's Matthew Fairburn.

Fairburn also notes the well-traveled Walls went through five colleges in five years, but his production on the football field at Lincoln might have some NFL teams willing to give him a shot.

According to LUBlueTigers.com, Walls racked up 17.5 tackles for loss and 10 sacks in 2014. Although these stats were compiled against the likes of Langston and Texas College, it's hard to ignore the eye-catching numbers. 

"Physically looking at the kid, he's like a big Greek god. He's huge," said Freeman Horton, who coached Walls at Coahoma Community College, per Fairburn. "He's got some of the biggest hands you've ever seen. They swallow you, man. His hands will swallow you up."

Walls may have an image issue to overcome, but at a towering 6'7", 290 pounds, might be an ideal fit in a 4-3 system that allows him to show off his skills as an interior pass-rusher.