COSTA MESA, Calif. (AP) — Jim Harbaugh was hired as head coach of the Los Angeles Chargers. He leaves Michigan after capping his ninth season as coach of college football’s winningest program with the school’s first national championship since 1997. Harbaugh made the highly anticipated decision to go back to the NFL after a second interview and resume his chase for a Super Bowl that eluded him as a quarterback and coach. He will be the first former Chargers player to return to the team as head coach.