Michigan has lost its second assistant coach this offseason, which marks the second year in a row that the Wolverines will have to replace two assistant coaches during the offseason.

According to Scout.com's Brian Snow, assistant Billy Donlon has accepted the position of assistant coach at Big Ten foe Northwestern.

"For me, I think it comes down to, from what I've heard, is that Billy has obviously known Chris Collins for a long time," Snow told The Michigan Insider. "Both grew up in the Chicago area and I don't necessarily know how far back their friendship goes, but they've known each other for a long time. They're very comfortable with each other, [Donlon] is comfortable with Chris, he's comfortable with the area so it's kind of a homecoming for him. He's looking for someone who he has a longstanding relationship with."

Donlon has deep ties to the Chicago area, Wildcats head coach Chris Collins and the Northwestern program. Donlon's father, Billy Donlon Sr., was a longtime assistant for the Wildcats from 1987-94. According to the Chicago Tribune's Shannon Ryan, Donlon praised Collins and called him a 'big brother.'

"He's always been a great adviser," Donlon told Ryan. "He's been a great friend and like a big brother in that way."

After a 109-94 record in six seasons at Wright State, Donlon spent one season under head coach John Beilein as an assistant.

Stick with The Michigan Insider for this developing story.