Gophers left tackle Ben Lauer injured his left knee Sunday during the team's third practice. Even though it wasn't said to be serious, it exposed one of the team's concerns.
Lauer is a 6-7, 317-pound junior who was named a freshman All-America two years ago, but injuries limited him to six starts last year. At right tackle, the Gophers have 6-9, 324-pound junior Jonah Pirsig, who has battled injuries through his college career, too.
The Gophers really hope those two stay healthy, so they can keep 6-5, 310-pound senior Josh Campion at right guard, instead of moving him back to tackle.
With Lauer icing his knee, the Gophers gave 6-6, 310-pound sophomore Alex Mayes and 6-6, 291-pound freshman Quinn Oseland reps at left tackle with the first-team offense Sunday.
"You get guys dinged up, you're going to have to test your depth pretty quickly," said Matt Limegrover, the team's offensive coordinator and offensive line coach.
Oseland is from Springfield (Ill.) Sacred-Heart Griffin and was one of the highest-rated players in this year's Gophers recruiting class.
"I'm really impressed with Quinn as far as a true freshman kid coming in," Limegrover said. "He was so well-coached in high school that you can see that carryover. There's just a naturalness about what he does."
Mayes' development at Minnesota has been slowed by a shoulder injury, but Limegrover said he's fully healthy and no longer has to wear a shoulder harness.