| Abbreviation | Definition |
|---|---|
| GRB | Greg Reinhard Baseball |
| GRBL | Greater Rockford Baseball League |
| GTBL | Greater Toronto Baseball League |
| GVBA | Greater Victoria Baseball Association |
| GWCB | George Washington University Club Baseball |
| GWY | God wants you |
| GYB | Glenview Youth Baseball |
| GYBA | Georgetown Youth Baseball Association |
| GYBA | Grayslake Youth Baseball Association |
| GYBA | Greenfield Youth Baseball Association |
| GYBS | Geneseo Youth Baseball Softball |
| H | Hits |
| H | Hits against |
| HBA | Hilliard Baseball Association |
| HBL | Habbo Baseball League |
| HBL | Hillsborough Baseball League |
| HCBB | Hard Coded Baseball |
| HCBL | Hampton Collegiate Baseball League |
| HCBL | Hamptons Collegiate Baseball League |
| HCBL | Hudson Cliffs Baseball League |