After the Patriots (9-17, 2-10 A-10) had taken a one-point lead with five seconds left in regulation, Jett made 1-of-2 free throws to send the game into overtime.
Rob Loe drained back-to-back 3-pointers to start the extra time and Jett scored four points to give the Billikens (24-2, 11-0) a four-point lead with less than 2 minutes left.
St. Louis hung on to extend its school-record winning streak.
Scarlett Johansson steps out with fiance after pregnancy reveal
Jessica Simpson shares three-way kiss with friends in photo