The Blue Demons (12-18, 3-15 Big East) broke a nine-game losing streak and denied Seton Hall (19-11, 8-10) the No. 8 seed in the conference tournament. That goes instead to West Virginia, which defeated South Florida on Saturday.
DePaul will be the No. 16 seed in the Big East tournament. Seton Hall fell into a tie for ninth in the conference with Connecticut, and the schools split two games this season.
Seton Hall shot only 5 of 16 from 3-point range. Crockett was 5 of 7 from behind the arc, with DePaul going 10 of 26 as a team.
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point guard Melo Trimble, considered a lock to leave the program before struggling in the second half last season, has withdrawn from the NBA draft and will return for his junior season.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.