The Generals, already out of semifinals contention, finished this season with an 8-10 record, their best mark since joining the league in 2009.
Happi Noube struggled on his shot but still came away with 14 points and 14 rebounds.
Noube went four-of-12 from the field and missed 11 of his 17 free throw attempts.
The Heavy Bombers blew a chance to be in a position to claim a Final Four spot and instead are now in danger of getting eliminated if Perpetual Help wins over San Sebastian.
If the Altas lose, they will play a playoff against the Bombers for the last semis slot.
JRU’s crucial setback also assured Letran a Final Four ticket.
Jon Lopez had a double-double with 11 points and 14 boards for the Bombers. Cris de la Paz had 18 points, six rebounds and four assists.