Dwayne Evans nearly set a career high in points for the second straight game, and No. 16 Saint Louis' defense locked down Butler in the second half for a 67-56 win Saturday to reach the Billikens' first Atlantic 10 title game.
Evans had 24 points and 11 rebounds a day after going for 25 and nine in the quarterfinals against Charlotte.
Top-seeded Saint Louis beat the Bulldogs for the third time this season. Butler may be the bigger name, but the Billikens have been the class of the A-10 in 2013.
The Billikens (26-6) held Butler without a field goal for almost seven minutes midway through the second half to pull away. Meanwhile, Evans went to work inside, showing off his post moves at 6-foot-5 or earning free throws to put the Bulldogs (26-8) in foul trouble.
Butler was up 24-17 with more than 5 1/2 minutes left in the first half, then shot 11 for 37 from the field the rest of the way. Leading scorer Rotnei Clarke had 10 points in the first 11 minutes; he managed only six more.