Michigan offensive guard Karsen Barnhart had to wait a while, but he learned Saturday he’s NFL-bound, too. Barnhart is signing with Jim Harbaugh and the Los Angeles Chargers, according to ESPN’s Adam Schefter. Barnhart showed his versatility in his five years at Michigan, playing several different positions on the line. He played mostly at right tackle, and while most believe he’s a guard at the next level, he more than held his own. He appeared in 41 games with 29 starts across the offensive line in his career — the only position on the line he hasn’t played is center — and he started nine ga…