LOS ANGELES — While Michigan coach Jim Harbaugh has been in the headlines this season for separate NCAA investigations which have led to a pair of three-game suspensions, the players have remained resilient and, seemingly, unbothered. Michigan (13-0) won a third consecutive Big Ten championship and is preparing for the Rose Bowl national semifinal against Alabama (12-1) on Monday. The winner advances to the national championship, which Alabama has won three times in the College Football Playoff format since 2014. Michigan has lost its previous two national semifinals, in 2021 and 2022. The Wol…