The Green Spikers fell prey to league leader FEU 21-25, 20-25, 18-25 Saturday to end their first round campaign.
Team captain Cris Dumago finished with 9 points while John Delos Reyes and Geraint Bacon had 8 markers each.
The team drops to 2-5 in the team standings with those victories coming from at the expense of cellar dwellers UE and UP. The Tamaraws remain undefeated in the tournament.
Despite their record, the rebuilding Green Spikers has shown that they can hang tough against the top-tier teams. They look to come up with a much improved showing in the second round.