Levi Wallace remembers watching Marlon Humphrey at last year's NFL combine. His old Alabama teammate was soon to be a first-round pick. It looked cool.

Just finding the field, however, was the plan for Wallace's senior season. Coming to Alabama in 2014, the Tucson, Arizona product wasn't a big deal. Nobody offered him a scholarship so he arrived in Tuscaloosa as an undersized walk-on.

"I was just worried about playing," Wallace said. "I didn't know how my season would go."

Move ahead to this week and Wallace is in Indianapolis as one of the more unlikely NFL combine stories. After winning a starting job at cornerback Week 1, Wallace became one of the more consistent members of the Alabama secondary.

Though he's not as outwardly self-assured as say, teammate Tony Brown, Wallace said that skinny 18-year old version of himself might believe he'd one day be at the NFL combine.

"He'd probably believe it," Wallace said Sunday. "I had a lot of confidence in myself not knowing where I'd be. But if I would have told myself, it definitely would have motivated me looking back. I'd probably believe it but then I'd probably be a little in shock. I'm blessed. It's a dream come true. It's a great experience being here."

That's faith considering how off-the-radar the younger Wallace was.

Not one scholarship offer came his way.

"I didn't but I believed I was a great football player coming out of high school," Wallace said. "There was never a doubt in my mind. That's why I played with a lot of confidence. It wouldn't have shocked me too much. I would have told myself 'You better do good at the combine.'"

The physical testing comes Monday. His plan is to showcase his speed and ball skills. Wallace wants the scouts to see his hips in defensive back drills.

Being a former walk-on who earned a scholarship after two years plays well in the interviews.

"Teams love my story," Wallace said. "They love me being a walk on. It shows a lot of adversity, a lot of character. Some can't believe it watching my film. They didn't know I was a walk on, just the way I played. I guess that goes to me and Coach Saban teaching me everything that I know."

NFL.com projects Wallace as a sixth or seventh round pick as teams still have questions about his viability in the league.

It's also clear Wallace was right. Teams are fascinated with his story.

"He's the opposite of all the other guys on that defense," one AFC team regional scout told NFL.com. "I think he was a zero stars prospect and he's turned himself into a starter all the way from being a walk-on. To do that at Alabama tells you about his mental toughness. He can play a little bit too."

Michael Casagrande is an Alabama beat writer for the Alabama Media Group. Follow him on Twitter @ByCasagrande.