Travis Taylor had 19 points and a career-high 19 rebounds on Wednesday night, and Xavier never trailed in the overtime, beating No. 16 Saint Louis 77-66, ending the Billikens' 11-game winning streak and leaving the Atlantic 10 title up for grabs.
Xavier (17-12, 9-6 A-10) ended a long winning streak for the second time in eight days. The Musketeers snapped Memphis' 18-game streak at the Cintas Center last week.
The Billikens (23-6, 12-3) haven't won a share of a conference title since 1970-71 in the Missouri Valley. Their last outright title came in 1956-57. They could have clinched the No. 1 seed in the conference tournament with a win on Wednesday.
Instead, they fell into a first-place tie with No. 21 VCU, which beat Richmond on Wednesday. Saint Louis beat VCU during its 11-game winning streak for the head-to-head advantage.
Saint Louis finishes the season at home against third-place La Salle on Saturday. VCU is at Temple on Sunday.