Heuir added seven rebounds and seven assists and was 13 of 14 from the free-throw line. Heuir and Stevenett combined for all five 3-pointers for the Thunderbirds (8-12, 6-5 Big Sky), who won their third straight.
The Hornets led 39-26 at halftime, but a 12-2 run to open the second half got the Thunderbirds back in the game. Stevenett's 3-pointer with 9:24 to play put Southern Utah ahead 52-50, and the Thunderbirds went on to lead by as many as 12.
Southern Utah shot 50 percent from the field, including 60 percent after halftime.
Maryland point guard Melo Trimble has withdrawn from the NBA draft and will return to College Park for his junior season, sources told ESPN.
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.