Multiple NFL teams gathering information on Michigan's Jim Harbaugh as potential coaching hire

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Multiple NFL teams have been making calls in recent weeks to gather information about Michigan head coach Jim Harbaugh, who has updated staff lists and has evaluated openings in anticipation of a potential return to pro football after Monday's College Football Playoff National Championship game, sources say.

Harbaugh also recently retained agent Don Yee, who has represented high-profile NFL clients such as legendary quarterback Tom Brady and Broncos head coach Sean Payton -- another sign Harbaugh remains interested in an NFL return after interviewing for jobs the past two years.

The Chargers are believed to be among the teams at least considering speaking with Harbaugh, who turned 60 last month. The Raiders might speak with him, as well. Harbaugh has connections to other teams that could potentially make head-coaching changes, such as the Bears, who selected him in the first round of the 1987 NFL Draft. And his resume easily makes him the most accomplished coach available, pending the outcome of Bill Belichick's upcoming meetings with Patriots brass following the conclusion of the regular season.

Harbaugh and the Wolverines had a frantic week, landing back in Ann Arbor early Tuesday morning after their Rose Bowl victory over Alabama in the semifinals, then jetting to Houston on Friday for the upcoming championship game against Washington. Once that game is over, Harbaugh's attention will turn back to his future -- and his NFL prospects could heat up quickly.

Unlike current NFL assistant coaches -- who are barred under the new anti-tampering policy sent to clubs on Friday from interviewing in-person for head coaching jobs until