Michigan head football coach Jim Harbaugh, who earlier this month led the Wolverines to a national championship, his crowning achievement during nine years with the program, is leaving his alma mater to return to the NFL, where he will coach the Los Angeles Chargers. Harbaugh, 60, a former Michigan and NFL quarterback, was a first-round NFL draft pick by Chicago in 1987 and spent two seasons (1999-2000) late in his career with the Chargers and made 17 starts. “My love for Michigan, playing there and coming back to coach there, leaves a lasting impact,” Harbaugh said in a statement on the Charg…