Middleton, 6-1, 250, may not possess ideal size for a BCS-level defensive lineman, but he's quick off the ball and proved a difficult matchup for the offensive linemen who attended Charlie Strong's camp last weekend, including Skylar Lacy, a 6-7, 275-pound Louisville commitment.
"That's the only person they had me go against [Sunday]," Middleton said. "He couldn't stop me. I'm just a little more ahead of him but he's got natural talent and is going to be pretty good.
"I play against a lot of tall offensive tackles and my first step is probably my most valuable asset. After my first step, they have to reach down to get me because I'm shorter than everybody. So I use my speed and lack of height against them."
"I think I did well. They were really impressed and seemed almost amazed. They showed me a lot of individual attention and it they were more hands-on with me."
Middleton enjoyed working out with Louisville assistant Clint Hurtt, who will serve as his recruiting contact for the Cardinals moving forward in the recruiting process.
"I like him, he's an intense coach. My high school coach and him coach alike," said Middleton. "To me it was like a regular practice. He liked my work ethic and he was really impressed with me."
Middleton, who has offers from Middle Tennessee, Tennessee State, Arkansas State, Tulane and UAB, among others, said he favors Louisville and Mississippi State despite not having scholarships from either program. Middleton camped at both schools this month.
"They really like me and I like them," Middleton said. "Louisville and Mississippi State are my top two schools. I just like how the coaches are. It feels like we're on the same page. Those two feel more like home and I feel comfortable there. I feel like those coaches are going to be there awhile."