By Chris Rosvoglou Michigan head coach Jim Harbaugh will have an important decision to make at quarterback this offseason. He has two really intriguing options in Cade McNamara and JJ McCarthy. Speaking to reporters on Friday, Harbaugh provided an update on this offseason’s quarterback competition. “It’ll be competitive,” Harbaugh said. “The dynamic, I would say, would be competitive. I’ll tell you the exact same thing I’d tell Cade or JJ or any other player on our team that’s competing for any position. Who’s going to play? The best player. How are we going to figure out who the best player i…