ALLEN PARK -- Frank Ragnow never allowed a sack at Arkansas. Perhaps that shouldn't be a surprise, because cnters allow the fewest sacks by nature of the position. But Ragnow was one of the best centers in the country.

According to ProFootballFocus, he was the very best.

And you'd be hard-pressed to find anybody in Allen Park who isn't excited by what that could mean for the Detroit Lions' long-suffering offensive line.

"He's a dog," Da'Shawn Hand said. "He got selected first (round) for a reason."

Hand is a rookie defensive lineman that Detroit took in the fourth round. He also played his college ball at Alabama, which means he's one of the only players who has an intimate knowledge of what exactly the Lions are getting. And what exactly is the club getting?

"It's just self-explanatory," Hand said. "You put on the tape, you can see it."

The tape really is something to behold. In more than 2,500 snaps at guard and center, he never allowed a sack. Last year, he allowed just one pressure at all. One.

Pop in the tape from that game against Alabama, and it's easy to see why Hand was so impressed. Because Ragnow dominated the Crimson Tide's fearsome defensive line. According to ProFootballFocus, he had the fifth-best game by any center in the country that week -- and, again, that came against Alabama. Which, you know, had a defensive line that featured three players who were drafted last month, including Da'Ron Payne, the 13th overall pick.

Ragnow didn't allow a single pressure that day.

"I don't really study a lot of college tape," guard T.J. Lang said, "but everything I've heard has been really positive. I think the rookies just got here (a few) days ago, so he seems like a good kid, smart guy. Works hard. And anytime you can add another good player to the group, it's going to raise the competition for everybody and make everybody better.

"So everybody's excited to add him to the group."

While Lang might not have watched the film, linebacker Jarrad Davis has. He's seen Ragnow up close, too. The former Florida star saw him a couple times in the SEC, and remembers the 2016 game vividly.

Of course, that could have something to do with Arkansas running roughshod for 223 yards in a 31-10 win.

"That offensive line and the way they ran the ball on us that game, I think that season, that was probably the most yards we gave up at that point in the season, rushing," Davis said. "(Ragnow) was a guy that definitely held it down in the middle for them."

It remains unclear where Ragnow will play in Detroit. He was mostly a center in college, and the Lions have a need there with Travis Swanson now in the Big Apple. But Graham Glasgow has played well at center as an injury replacement for Swanson the last two years, and was drafted to play the position anyway. There are people in Allen Park who believe his best position is there, and indeed, he was seen repping at center when OTAs opened on Monday. Ragnow was playing guard.

The Lions did not open the workout to reporters, and Tuesday's session will be closed too. The first access isn't until Thursday, which means we don't know how much of Ragnow's time was split between guard and center. But no matter where he ends up, it's clear people in Detroit are excited by the future of the offensive line.

"I see him in the weight room working out and I hear a lot of coaches saying great things about him, so I think he's going to come a long way," Davis said. "He's going to really help us out a lot."