Ann Harbor, Michigan - As the Michigan college football season has come to an end following its Playoff loss to TCU over the weekend, head coach Jim Harbaugh has become a hot commodity to fill NFL head coaching vacancies.

The Denver Broncos have reportedly reached out to the Michigan coach about possibly filling its coaching hole following the team's firing of first-year head coach Nathaniel Hackett last week.

After a 4-12 season this year, the Broncos are undoubtedly looking for a new leader that knows how to win, which Harbaugh has proven at both the NFL and college level.

Since becoming the head coach of his alma mater, the Wolverines have gone 25-3 the last two seasons, making two appearances in the College Football Playoff.

After interviewing for the Minnesota Vikings vacancy a year ago and losing the job to Kevin O'Connell, Harhbaugh has since spoken wistfully about winning a Super Bowl title.

"No man knows the future. I can't make any vows of what's going to happen or what's not going to happen," Harbaugh said about the possibility of taking an NFL head coaching job.

In 2013, the 60-year-old veteran coach came close to a Super Bowl victory when he led the San Francisco 49ers to Super Bowl XLVII, but lost to the Baltimore Ravens – who were coached by his brother John.

If Michigan loses Harbaugh to the NFL next year, it will mark their second major coaching loss this season, after associate head coach Biff Poggi left the Wolverines to become head coach for the Charlotte 49ers.

Last year, Harbaugh signed a five-year contract extension with Michigan that runs until 2026. If Harbaugh leaves the program this year, the buyout portion of his contract indicates that he would owe Michigan $2.25 million.