| Abbreviation | Definition |
|---|---|
| MLG | Major League Gaming |
| MLH | Men's Left Handed |
| MLJ | Men's Long Jump |
| MLL | Major Lacrosse League |
| MLL | Major League Lacrosse |
| MLN | Minor League Notes |
| MLO | My Line Overboard |
| MLP | Major League Player |
| MLP | Major League Posters |
| MLS | Major League Soccer |
| MLSE | Maple Leaf Sports and Entertainment |
| MLSE | Maple Leaf Sports Entertainment |
| MLSE | Maple Leafs Sports and Entertainment |
| MLSE | Maple Leafs Sports Entertainment |
| MLSE | Multiple Losing Sports Enterprises |
| MLV | Marginal Lineup Value |
| MLW | Major League Wrestling |
| MLY | Major League Yardball |
| MM | Majoras Mask |
| MM | Marcus Madrid, baseball pitcher |