Western Michigan (19-12, 10-8 Mid-American) earned the No. 6 seed and will play 11th-seeded Ohio on Monday in the opening round of the conference tournament.
Central Michigan (22-7, 12-6) retained the top seed and will have a three-round bye into the semifinals next Friday.
The Broncos held CMU to 28-percent shooting in the first half and led by 18 points just before the intermission. The Chippewas shot 50 percent in the second half and twice got within seven points.