| Team name | Location | League | Level | Status |
|---|---|---|---|---|
| Amherst College Mammoths | Amherst, Massachusetts | college | active | |
| Kenosha Mammoths | Kenosha, Wisconsin | Frontier League | professional | defunct |
| MacArthur Mammoths | Washington, D.C. | high school | active | |
| Maine Mammoths | Portland, Maine | National Arena League | professional | defunct |
| Omaha Mammoths | Omaha, Nebraska | Fall Experimental Football League | professional | defunct |
| Winston-Salem Mammoths | Winston-Salem, North Carolina | Southern Hockey League | professional | defunct |