Deng Deng scored 11 points off the bench for the 49ers (4-6).
An 18-6 run over the last 7:16 of the first half gave Long Beach State permanent control. Caffey ignited the surge with 10 points, including two 3-pointers.
The 49ers led 43-32 at halftime, and BYU-Hawaii got no closer than seven the rest of the way.
Okesene Ale and Pablo Coro scored 12 points each for the Seasiders.
Purdue coach Matt Painter says players haven't used the fifth-year graduate transfer rule for its true intent.
The 2017 recruiting class is short on point guards, with Trevon Duval leading only eight prospects from the ESPN 60 who are still available.
The dust has settled after players made their NBA draft decisions. Which college teams won? Which lost? Well, Villanova is pretty happy. USC, meanwhile, might not be as thrilled.