Jett's basket with 35 seconds remaining broke a 61-61 tie, and Ellis made four free throws to keep the Billikens (5-3) in control and give them back-to-back victories for the first time this season.
Saint Louis has won both of its games since the death of coach Rick Majerus, who stepped down before this season and was replaced by Jim Crews. Majerus died Saturday in Los Angeles.
It was the teams' first meeting since 1981.
Maryland point guard Melo Trimble, considered a lock to leave the program before struggling in the second half last season, has withdrawn from the NBA draft and will return for his junior season.
Louisville's Chinanu Onuaku, who recently underwent a medical procedure to correct a heart rhythm issue detected during the combine, will keep his name in the NBA draft pool.
Andrew White III will return to the Nebraska men's basketball team next season after removing his name from the NBA draft.
|Texas San Antonio||3-15||13||5-27|