Monmouth (8-8, 2/3 Metro Atlantic) took a 35-32 lead into halftime, and then opened the second half on a 10-2 run. The Hawks pulled away in the second half, shooting 60 percent from the field, and led by as many as 22.
Monmouth and Niagara were playing for the first time as conference opponents, with Niagara winning the only previous meeting between the teams in 2008.
Trae Young had 29 points and nine assists and Oklahoma edged No. 25 Southern California 85-83 on Friday night in the Hall of Fame Basketball Classic tripleheader.
Elijah Brown scored 18 of his 20 points in the second half to lead six Oregon players in double figures in a 95-65 romp over Colorado State on Friday night.
Dikymbe Martin knocked down all four of his 3-pointers and scored a career-high 22 points and Menno Dijkstra added career highs of 12 points and 12 rebounds as UC Riverside snapped a four-game skid with a 67-48 victory over Air Force on Friday night.