| Abbreviation | Definition |
|---|---|
| MMAC | Montreal Mynix Athletic Club |
| MOAA | Minority Opportunities Athletic Association |
| MOAC | Mid-Ohio Athletic Conference |
| MPIAA | Mount Pleasant Independant Athletic Association |
| MPIAA | Mountain and Plains Intercollegiate Athletic Association |
| MRAA | Morgan Ross Athletic Association |
| MSAC | Massachusetts State Athletic Commission |
| MSAC | Mid State Athletic Conference |
| MSAP | Middle Schools Athletic Program |
| MSAT | M S in Athletic Training |
| MSAT | Master of Science in Athletic Training |
| MSAT | Master S in Athletic Training |
| MSAT | Masters of Science in Athletic Training |
| MVAL | Mission Valley Athletic League |
| MVAL | Monocacy Valley Athletic League |
| MVSA | Maple Valley Special Athletics |
| MWAC | Mid-West Athletic Conference |
| MYAS | Minnesota Youth Athletic Services |
| NAA | Newton Athletic Association |
| NAAC | National Association for Athletics Compliance |