Loyola Marymount (6-4) made 10 of 19 from beyond the arc and hit 32 of 59 (54.2%) field goal attempts.
Loyola Marymount had a 35-31 advantage at the break and pushed that to 60-43 at the 10:58 mark. Malcolm Brooks nailed two straight treys and Khalil Ahmad hit a jumper to close to 64-51. Haney answered with a 3-pointer and the Lions roared to the finish.
Tre Coggins had 18 points and Lanerryl Johnson added 16 as Cal State Fullerton (6-3) dropped its second in a row after winning six straight.