Greg Gilmore is dirty.

No, it’s not like you’re thinking. Gilmore isn’t covered in filth, and he’s not prone to late hits and trash talk while on the field.

He’s dirty because of his new position in LSU’s 3-4 defense: nose tackle.

“Dirty work,” said Davon Godchaux, playing the team’s hybrid defense end/defensive tackle role in new defensive coordinator Dave Aranda’s unit.

“I salute Greg and Christian (LaCouture) every day,” he continued. “That’s the dirtiest work. You’re not going to make too many plays in the nose. You’ve got to do the dirty work.”

Gilmore disagrees. He’ll be making plays, he shoots back at his teammate – just from a different location.

Gilmore and LaCouture are LSU’s nose tackles in Aranda’s new scheme. That means playing head up on the center, as opposed to a defensive tackle’s stance – in between the guard and the center or between the tackles and guard.

Defensive line coach Ed Orgeron describes it as “more of a physical” position. Adjusting to it hasn’t always been easy.

“We’ve got work to do there,” Orgeron said earlier this week before LSU’s ninth practice of the spring Saturday. “You line head up on the guy. You line up right dead in the middle instead of on the edge in the 4-3, (where) you’re taking an edge.

“You’ve got to be able to get knocked back on the center,” Orgeron continued. “It’s a little bit different.”

Aranda’s personnel moves and his defensive positions are becoming clear.

You’ve got LaCouture and Gilmore at nose tackle. Godchaux, Frank Herron and Lewis Neal are defensive ends who will move around - from lining up between the guard and tackle to outside of the tackle.

And there’s the “Buck,” a stand-up end/outside linebacker role that Arden Key, Sione Teuhema and Isaiah Washington are playing. There’s the “F” linebacker as well, another stand-up role that Tashawn Bower is in.

LaCouture claims the nose tackle position in Aranda’s defense isn’t your typical space-eating role seen in many 3-4 units. Orgeron agrees.

So what is it? Gilmore explains some.

“The main thing is you want to eat up blocks, keep them off the (linebackers),” he said. “When you do that, you make plays. Plays are going to come to you.”

So not that dirty after all? Maybe.

Gilmore isn’t just learning a new position this spring. He’s getting a new car, too.

Gilmore, a rising junior who redshirted as a freshman, was involved in a three-car accident on Monday on Nicholson Drive. He didn’t suffer injury, but his car – a 2009 Chevy Malibu – did.

“I get a new car out of it,” he said Thursday. “I had that car since the sophomore year of high school.”

What’s he plan on buying?

“Something nice,” Gilmore said smiling, “something exotic.”

Gilmore’s more thankful for walking away unscathed from the crash.

“I just laid out in the grass and was like, ‘I beat death again,’” he said.

Follow Ross Dellenger on Twitter @RossDellenger.