| Abbreviation | Definition |
|---|---|
| FC | Fielder's Choice |
| FCBL | Futures Collegiate Baseball League |
| FCTB | Foster City Tournament Baseball |
| FDBA | Fort Dodge Baseball Association |
| FDBA | Ft Dodge Baseball Association |
| FIBS | Federazione Italiana Baseball e Softball |
| FIBS | Federazione Italiana Baseball Softball |
| FIP | Fielding Independent Pitching |
| FLBA | Forest Lake Baseball Association |
| FLD | Fielding Percentage |
| FLEX | FLEXible player |
| FLS | Funny Little Stance |
| FMBA | Fredericton Minor Baseball Association |
| FO | Fly Out |
| FO | Foul Out |
| FOAB | Friends of Atascocita Baseball |
| FOBL | Front Office Baseball League |
| FOD | Field Of Dreams |
| FPCT | Fielding Percentage |
| FSG | Fenway Sports Group |