Michigan is making a change to its staff, according to a report from Sporting News.

Wednesday morning, Sporting News reported that strength coach Kevin Tolbert won’t be returning to the program for the 2018 season. He has served as the strength and conditioning coach for the Wolverines since 2015, when Jim Harbaugh was named head coach.

This is somewhat of an odd move for Harbaugh, as he and Tolbert have worked together for the last nine seasons, dating back to 2009 when he joined the staff at Stanford. He then followed Harbaugh to the NFL to join the San Francisco 49ers staff. He then came to Ann Arbor in 2015.

This was actually the second stint at Michigan for Tolbert, who served as the assistant strength and conditioning coach for the Wolverines from 2001 through 2007. He then had a one-year stop with the Detroit Lions before heading West for Stanford.

Tolbert is a 1981 graduate of the United States Naval Academy, and was a three-time letter winner on the Midshipmen’s football program.

No announcement has been made regarding a possible replacement.