Michigan's underwhelming 2017 season had Jim Harbaugh doing some self-scouting this winter when it came to his team and coaching staff.
It also has outsiders beginning to wonder whether Harbaugh can win at an elite level in Ann Arbor.
CBS Sports is out with its annual ranking of Power 5 head football coaches, and Harbaugh checks in at No. 18.
That's a 13-spot drop from 2017, when the Wolverines were coming off back-to-back 10-win seasons under Harbaugh.
Writes Tom Fornelli: "I can't help but believe that Harbaugh fatigue plays something of a role here, considering all the attention he receives and the lack of significant results thus far.