UC Davis trailed by seven at the break, but pushed to a 48-46 lead at the 7:39 mark. Sypkens hit two 3-pointers and Hawkins hit another to grab a five-point lead with 58 seconds left.
Joel Awich answered with a jumper and a dunk to cut the Mustang's deficit to one. After two Hawkins free throws, Cal Poly missed on two 3-point attempts. Iggy Nujic hit a free throw for the final margin.
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point guard Melo Trimble, considered a lock to leave the program before struggling in the second half last season, has withdrawn from the NBA draft and will return for his junior season.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.