Morrill was an All-American at Ricks College and a two-time All-Big Sky selection for Gonzaga University.

He started his coaching career in 1974 as an assistant at Gonzaga, and continued at the University of Montana under Mike Montgomery in 1978.

[1][2] In the spring of 1986, he was promoted to head coach of the Grizzlies,[2] and led them to an NCAA berth in 1991.

He has also racked up an incredible home record of 193–13 (.937) in the Dee Glen Smith Spectrum as coach of the Aggies.

All throughout the 2000s and early 2010s under Morrill, Utah State (.764) had the fourth-best winning percentage in the nation behind Duke (.831), Kansas (.809) and Gonzaga (.799).