It's been a problem that's plagued Tennessee for several years, and it's a problem that spells doom in the SEC for defenses.
A lack of speed has unceremoniously been synonymous with the Vols for several years.
But, that trend is seemingly beginning to become reversed with the help of new blood as Tennessee adds young faces to an already young and inexperienced defense.
"Yeah, I did. I saw a much faster football team in all areas in moving around," Tennessee head coach Butch Jones said. "But now it's being able to get off blocks and make plays. But just our overall team speed I could see much improvement."
The added speed is coming from all over the field.
At defensive line, the Vols' first-team unit featured two former linebackers as defensive ends and a converted end that's moved to defensive tackle.
Defensive end Corey Vereen walked on to campus a linebacker but has spent all but his first spring practice after enrolling early as a defensive lineman.
"Monumentally," Vereen answered when asked how much faster Team 118 is compared to last year's edition. "Last year we had a lot of guys to plug up holes and that was good, but we didn't have a lot of playmakers on the defensive line. We had big bodies. Now, I feel like we have a lot of guys who can move. There's a lot of blitzes we are drawing up and I like how guys are moving inside and outside."
In the secondary the Vols have added a truckload of youth. Tennessee added safeties Todd Kelly Jr., Cortez McDowell and Elliot Berry along with cornerbacks Rashaan Gaulden and Evan Berry as well Emmanuel Moseley and D'Andre Payne, who enrolled last January and took part in spring practice with the Vols.
Even though the reality is the group of defensive back newcomers have zero snaps in the SEC their teammates see the added speed through one practice.
"It definitely helps, speed always kills," junior safety Brian Randolph said of the young group. "It will probably give opposing offenses a lot of stress this year."
At the linebacker spot the Vols are hoping the emergence of sophomore linebacker Jalen Reeves-Maybin will be a boost of speed at the middle level of the defense.
Jones said Reeves-Maybin has shown promise beginning last season on special teams and into the spring months and summer. There's no question on whether or not Reeves-Maybin brings speed; the question is can his now 230-pound body hold up at linebacker.
"We have a lot of expectations for him. Jalen gained valuable experience on special teams last year," Jones said. "We moved him to linebacker in spring, and we've challenged him to put the necessary weight on that he needs to be able to have to play linebacker in this league at a very high level.
"He's been able to do that. He's very instinctive. We talk about your habits and being able to create those instincts and relying on your training so that it becomes instinctual, and he's been able to do that. Now, the next step will be can he take the added strength, the added size when we put the pads on."
While Jones wants Reeves-Maybin to bring more strength to his game, and he's worked hard adding nearly 25 pounds since the season ended in late November, the Clarksville native wants to bring something else to the table along with the added weight.
"Just adding weight and becoming a more explosive player," Reeves-Maybin said. "I feel like we were missing that on defense last year, somebody that can make that explosive play, so that's what I want to become."
Tennessee's linebackers forced just four turnovers last season and all four were manufactured by the now-departed Brent Brewer and Dontavis Sapp.
With that in mind, Reeves-Maybin's goal is simple.
"I want to be known as an impact player while I'm out here so that's what I want to get to," he said.
He's not the only one on this Vol defense that wants to be a disrupter. In fact, it's a big focus for the Vols' defensive line and has helped bring about a shift in scheme with a smaller, but faster, defensive line.
"Our entire scheme this year we are trying to blitz 10 times as much as we did last year," Vereen said. "It really fits for the personnel we have.
"When we were out there (Friday night) getting off the ball, I was looking and we were just getting off the line consistently faster and faster you could see we are a lot faster than last year. Last year, we weren't really getting off the ball. This year I see a lot more speed and that was good to see."
Added defensive lineman Danny O'Brien, "We love it. Because I think this year, we're smaller but we're quicker. I think we're playing better moving around. I think the pressures are going to help us a lot this year, stemming and throwing off the offense's game plan and stuff like that. I think it's going to help a lot. Last year we were really big in size, but we didn't move that much around. This year I think it's going to be a different kind of ballgame."
For a team that's been plagued by lack of speed the past few seasons, a new ballgame is just what the doctor ordered.