Long Beach overcame an 11-point first-half deficit and got three key second-half 3-pointers from Caffey. The first gave the 49ers their first lead of the game, 36-35, with 14:49 remaining.
With the score tied at 44-all, Caffey hit two more 3s and a two-point jumper during a 14-4 run that put Long Beach ahead 58-48 with 6:30 left.
Pacific closed within five points, then made it a two-point game on a Harris 3-pointer with 28 seconds to go, but Long Beach held on despite making just 2 of 8 free throws in the final minute.
Mike Krzyzewski says he has good reason to be excited for next season thanks to a combination of Duke's incoming freshmen and a core of experienced upperclassmen.
Georgia guard Juwan Parker has been awarded a medical redshirt, leaving him with two years of eligibility, after missing the 2015-16 season with a partially torn Achilles tendon.
Forward Trevon Bluiett has withdrawn from consideration from the NBA draft and will return to Xavier for his junior season.