Longtime Michigan State assistant coach Jim Bollman didn’t make an official announcement, but he may be calling it a career, based on a recent change to his Twitter account.

Since Mel Tucker was named the new head football coach, replacing Mark Dantonio after 13 seasons, it was reported that Tucker wasn’t planning on keeping many of his predecessor’s assistants. With that in mind, it appears that Bollman has retired after seven years with the Spartans.

Bollman’s Twitter bio now reads, “Retired College and NFL Football Coach.”

Bollman was a member of Dantonio’s staff from 2013-19, serving as the offensive coordinator and offensive line coach. He was also the program’s offensive line coach under Nick Saban from 1995-97.

Bollman’s other B1G experience came at Ohio State, where he was the offensive coordinator and offensive line coach under Jim Tressel from 2001-11. He also had stops at Boston College (2012), the Chicago Bears (1999-2000), and the Philadelphia Eagles (1998), among others during his coaching career.

Tucker is looking to piece together his staff at Michigan State, and quickly. So far, the only individual committed to the staff is defensive tackles coach Ron Burton, who passed on an opportunity to coach at Indiana to stay in East Lansing.