Fullback Ben Mason will miss the rest of Michigan’s spring practice because of a meniscal tear in his knee that will require surgery.

Michigan coach Jim Harbaugh shared the news on his weekly podcast, “The Harbaughs’ Podcast,” when his guest, former Michigan tight end Jake Butt, asked if Mason was still “cracking skulls.” Harbaugh revealed the injury and said Mason likely will be out six weeks.

“He was cracking skulls, doing Ben Mason stuff as spring ball was going,” Harbaugh said. “He had complained a little bit about his knee. His knee just didn’t feel right. Trainers couldn’t find anything really wrong with it. Another practice goes by, he keeps practicing. Finally did an MRI and figured that he had a meniscal tear and better to go in and do surgery on the meniscal tear, sew it back together than to keep playing on it.

“He’s gonna get meniscus surgery and will be out about a month and a half. We’ll get him back fully, fully up to speed. I love the medicine these days of taking that meniscus and sewing it back together rather than cutting a third of the meniscus out and then 20 years from now you don’t have a meniscus left. He would have kept going had we not gotten that MRI. He’s doing good.”

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Mason, listed at 6-foot-3, 251 pounds in the Wolverines’ last roster, is expected to play fullback and linebacker this fall. He earned the team’s “Toughest Player Award” last season.

"Ben can do everything,” Michigan running backs coach Jay Harbaugh said recently about Mason playing on both sides. "So giving him an opportunity to smash more people is always a good idea.”

Spring game update

The Michigan players will take the field at 5:45 p.m. Saturday at Michigan Stadium to begin warmups and drills for the annual spring game.

BTN will televise the practice live and has a designated window from 7-9 p.m. There will be radio coverage on 97.1 FM beginning at 6:45 p.m.

The game is free and open to the public and gates will open at 4:45 p.m. The first episode of “All or Nothing: The Michigan Wolverines,” the Amazon Prime Video docuseries, will be shown on the videoboards at approximately 5 p.m.