gridiron football league
C10556
concept
A gridiron football league is an organized association that schedules, regulates, and oversees competitive American or Canadian football games among member teams within a defined structure and season.
Observed surface forms (2)
- spring football league ×2
- professional indoor American football league ×1
Instances (5)
- Canadian Football League
- CFL
- XFL via concept surface "spring football league"
- NFL Europe via concept surface "spring football league"
- Arena Football League via concept surface "professional indoor American football league"