O
| Name | Pos. | Ht. | Wt. | Birth Date | College | Teams | Nickname |
|---|---|---|---|---|---|---|---|
| Ray Obias | G/F | 5 ft 11 in (1.80 m) | 160 lb (73 kg) | September 26, 1956 | UST | San Miguel | - |
| Robinson Obrique | G | 5 ft 11 in (1.80 m) | 157 lb (71 kg) | May 23, 1958 | - | CDCP | - |
| Jasper Ocampo | G | 5 ft 8 in (1.73 m) | 150 lb (68 kg) | February 20, 1974 | San Sebastian | Pop Cola | - |
| Joselito Ocampo | G | 6 ft 1 in (1.85 m) | 180 lb (82 kg) | December 10, 1952 | - | Tefilin | - |
| Pablo Ocampo | F | 6 ft 2 in (1.88 m) | 158 lb (72 kg) | October 25, 1954 | - | CDCP | - |
| Ben Ocariza | G | 5 ft 9 in (1.75 m) | 140 lb (64 kg) | September 14, 1954 | - | Filmanbank, CDCP | - |
| Nelbert Omolon | F | 6 ft 4 in (1.93 m) | 180 lb (82 kg) | June 30, 1980 | Philippine Christian | Sta. Lucia, Meralco, Air 21 | The Sparkplug |
| Wilmer Ong | C/F | 6 ft 5 in (1.96 m) | 245 lb (111 kg) | September 20, 1970 | St. La Salle | Ginebra, Sta. Lucia | - |
| Jon Ordonio | G | 6 ft 3 in (1.91 m) | - | March 21, 1976 | Masters | Pop Cola, Alaska, Red Bull | - |
| Emmerson Oreta | G | 6 ft 3 in (1.91 m) | 180 lb (82 kg) | March 28, 1980 | Santo Tomas | Talk 'N Text | - |
| Mulong Orillosa | F | 6 ft 2 in (1.88 m) | 192 lb (87 kg) | March 20, 1968 | Adamson | Shell | - |
| Jose Orosco | G | 5 ft 9 in (1.75 m) | 151 lb (68 kg) | March 22, 1952 | - | Tefilin | - |
| Mike Orquillas | G | 6 ft 2 in (1.88 m) | 170 lb (77 kg) | November 12, 1972 | Cebu Central | Ginebra, Sta. Lucia | - |
| Marvin Ortiguerra | F | 6 ft 5 in (1.96 m) | 210 lb (95 kg) | August 29, 1978 | Santo Tomas | Sta. Lucia, FedEx | - |
| Albert Ortiz | G | 6 ft 0 in (1.83 m) | 165 lb (75 kg) | November 6, 1959 | State | U/Tex, Manhattan | - |
| Jimmy Otazu | G | 5 ft 9 in (1.75 m) | 169 lb (77 kg) | April 4, 1952 | San Sebastian | U/Tex, 7-Up, Filmanbank | - |
| Mike Otto | C | 6 ft 6 in (1.98 m) | 210 lb (95 kg) | November 22, 1968 | Far Eastern | Alaska | - |
Read more about this topic: List Of Philippine Basketball Association Players