Broekhoff had nine rebounds for the Crusaders (6-2).
Frank Gaines scored 19 points for the Mastodons (5-5), who shot just 31.4 percent from the floor, including 4 of 20 in the second half, which prevented them from staying in a game they trailed by three points at halftime.
Broekhoff scored six straight points to ignite a 10-2 second-half run that gave Valpo control. With the score 45-41, Broekhoff made a 3-pointer, drained a jumper and hit a free throw on consecutive possessions, and the Crusaders built a 55-43 lead with 5:33 remaining.
IPFW got no closer than nine the rest of the way.
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point guard Melo Trimble, considered a lock to leave the program before struggling in the second half last season, has withdrawn from the NBA draft and will return for his junior season.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.