Jett's game-winning basket gave him 25 points and boosted the Billikens (22-2, 9-0 A-10) to a 16th straight win -- the first time they have accomplished the feat in a single season.
Dwayne Evans provided 14 points for Saint Louis.
The Explorers (12-11, 4-5) were paced by Jerrell Wright with 21 points and eight rebounds.
Steve Zack added 15 and 13.
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