The Wolverines will have three scholarship quarterbacks—junior Shane Morris, redshirt freshman Wilton Speight and true freshman Alex Malzone—at spring practice, which resumes on March 10 after a 10-day break.
True freshman Zach Gentry, who was rated the No. 4 pro-style quarterback in the class of 2015 by Rivals.com, is set to join the group this fall.
Over five games last season, Morris completed 35 percent of his passes for 128 yards with zero touchdowns and three interceptions.
"I think the thing's wide open," Michigan offensive coordinator Tim Drevno said last week. "Jim and Jedd (Fisch) are really handling that, and (it depends on) how they're feeling throughout the practice."
"At some point you'd like to think that that's clear cut and somebody earns that and it's not close," Harbaugh says. "That's what we'll be hoping for, but they were all good to start and there's going to be good competition at that position."
Last season Michigan ranked 11th in the Big Ten in passing yards per game and last in total offense.