| Abbreviation | Definition |
|---|---|
| PDC | Player Development Contract |
| PHI | Philadelphia Phillies |
| PHSBCA | Pennsylvania High School Baseball Coaches Association |
| PIP | Pittsburgh Pirates |
| PIT | Pittsburgh Pirates |
| PMBL | Pacific Metro Baseball League |
| PO | Pull Out(s) |
| PO | PutOut |
| POBC | poor old baseball card |
| POBC | Poor Old Baseball Cards |
| POSN | Position |
| PPBA | Pacific Palisades Baseball Association |
| PPBA | Prospect Park Baseball Association |
| PTBA | Peters Township Baseball Association |
| PWCC | Pre-War Card Collector |
| PYB | Pewaukee Youth Baseball |
| QBC | Queens Baseball Convention |
| QS | Quality Start ( Baseball) |
| R | Run |
| R | Runs |