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Freshman defensive end Sci Martin (87) participates in a drill during LSU's practice, Friday, August 5, 2016, at LSU's practice facility in Baton Rouge, La.

Advocate staff photo by HILARY SCHEINUK

Five LSU football players are recovering from injuries, and one could be serious.

Edge rusher Sci Martin, defensive lineman Christian LaCouture, tight end Jamal Pettigrew, defensive back Andraez Williams and running back Derrius Guice missed Tuesday’s practice, the fifth of the spring.

Martin, a sophomore-to-be, appears to have the most significant injury of those players. Coach Ed Orgeron said Tuesday that Martin suffered an injury during Saturday’s scrimmage, though he stopped short of revealing its extent.

“We haven’t gotten the results yet,” Orgeron said. “As soon as we get the results officially, I’ll let you know what happened.”

Martin, a McDonogh 35 graduate, had been running first in the rotation at buck, the hybrid edge rushing position that Arden Key normally occupies.

Guice, a 2017 Heisman Trophy hopeful, is suffering from a “swollen ankle or something like that,” the coach said. “Nothing bad.”

Pettigrew, a redshirt freshman from New Orleans, has suffered “some ankle problems,” Orgeron said, and has missed the last three practices. Coaches are waiting on a “diagnosis” of the injury, Orgeron said.

LaCouture missed practice a day after Orgeron announced that he would wear the traditional No. 18 jersey next season. The fifth-year senior told The Advocate on Monday that he’s dealing with “scar tissue” issues in his rehabilitated knee. LaCouture recently recovered from surgery for a torn anterior cruciate ligament in his right knee, an injury that cost him last season.

Williams, a redshirt freshman competing at cornerback, “should be back (in) a couple of days,” Orgeron said.

Speed demons

LSU’s brand new offense won Saturday’s scrimmage at Tiger Stadium, Orgeron said Tuesday.

How? Speed.

“Ran some up-tempo and got the defense very tired,” Orgeron said. “I thought the offense had the upper hand.”

New offensive coordinator Matt Canada said Monday at a luncheon that his players are adapting to his scheme quicker than any of the players did at his previous four coaching stops. Orgeron echoed that in a post-practice news conference Tuesday.

“He told me in five years, this is the best his offense has looked,” Orgeron said.

Media are not allowed to watch scrimmages. Reporters can only view about 20-30 minutes of individual drills at most practices.

Two 18s?

LSU’s coaches at least contemplated doling out two No. 18 jerseys for this upcoming season, but they decided against that, giving the traditional number to LaCouture, something announced Monday.

Fullback J.D. Moore, a former walk-on who rose to a starting role, was LaCouture’s biggest competitor for the honor, the defensive tackle said in an interview Monday.

Orgeron admitted that coaches used the No. 18 jersey in the re-recruiting process with LaCouture, convincing him to remain at LSU for a fifth year of eligibility.

“Christian was going out (to the NFL). Myself, Pete Jenkins and Dave Aranda went to his home and recruited him,” Orgeron said. “He was going out to the NFL. One of the things we discussed in the home was, as a recruiting tool, we wanted him to wear 18. It wasn’t a recruiting tool. We were going to give it to him anyway.

“We had a lot of guys that did deserve it. We thought about sharing it, but we don’t give two different numbers here at LSU. We don’t do it. We don’t plan on doing it.”

Ray’s move

Ray Thornton, a redshirt freshman from Texas, is learning a new position.

Orgeron said Thornton spent his first day Tuesday at the buck position, the hybrid edge rushing spot, moving from F-linebacker, a more traditional outside linebacker role. Thornton will play both positions, and they are both interchangeable, the coach said.

The buck players — Andre Anthony, Isaiah Washington and Martin — mostly work with Orgeron during practice. The F-linebackers — Corey Thompson, Devin Voorhies and M.J. Patterson — work with Dennis Johnson.

“He will sometimes play F and sometimes play B,” Orgeron said of Thornton. “Those positions are interchangeable. One just drops and one just rushes.”

Williams impressing O

Darrel Williams, the senior running back behind Guice, has lost weight and is down to 229 pounds, Orgeron said.

He’s “had one of the most improved springs,” the coach said.

“He’s running the ball very well,” Orgeron continued. “Had a good scrimmage on Saturday and another good scrimmage today.”

Follow Ross Dellenger on Twitter, @RossDellenger.