4. Combined win percentage in conference games of conference opponents (ie, strength of conference schedule)
Utah has the advantage in conference strength of schedule.
Utah: ASU (2-7), OSU (6-3), UCLA (6-3), USC (8-1), WSU (4-5), Arizona (3-6), Stanford (1-8), Oregon (7-2), Colorado (1-8) = 38 wins, 43 losses (0.469135802469136 combined win percentage)
Oregon: WSU (4-5), Stanford (1-8), Arizona (3-6), UCLA (6-3), Cal (2-7), Colorado (1-8), Washington (7-2), Utah (7-2), OSU (6-3) = 37 wins, 44 losses (0.45679012345679 combined win percentage)
Washington: Stanford (1-8), UCLA (6-3), ASU (2-7), Arizona (3-6), Cal (2-7), OSU (6-3), Oregon (7-2), Colorado (1-8), WSU (4-5) = 32 wins, 49 losses (0.395061728395062 combined win percentage)