U-M tweets 'Happy Birthday' message

— -- While Jim Harbaugh won't confirm or deny any contact with the University of Michigan, the  Wolverines don't seem to be hiding their interest in him about their coaching vacancy.

In fact, U-M officials even took the extra step to wish "Happy Birthday" to the  San Francisco 49ers' coach and former Michigan quarterback via social media Tuesday.

Harbaugh said Monday that he hasn't "participated in any of the speculation, the unnamed sources, the rumors" concerning his future as he enters this weekend's season finale against the  Arizona Cardinals.

A national report over the weekend has Harbaugh being relieved of his duties within 24 to 48 hours of Sunday's game, and it has also been reported that Harbaugh has a standing offer of six years and $48 million to return to coach at his alma mater.

General manager Trent Baalke confirmed Monday on 95.7 The Game that Michigan officials have, indeed, contacted the 49ers about the 51-year-old Harbaugh.

"I think the University of Michigan, in reaching out, did handle it correctly," Baalke said. "As I look at it, guys, it's very simple: He's the head football coach of the San Francisco 49ers. ...

"Our focus is on this last game. We'll address next season after this season is over, and not until then. We'll deal with this at the end of the season. That's when we'll deal with it."