I'm not sure if this was started, but I remember that there once was the WFL played sometime in 1974 and 75. It was distributed by the TVS Network, which I believe was a syndicator of the games.
The San Diego affilliate for the WFL was XETV from Tijuana.
What other affilliates were there?
TVS was the syndicator, but only for the 1974 season. There was no national TV coverage for what passed for the 1975 season (the league shut down before the season was complete).
As far as affiliates go, from what I remember, KPHO-TV carried the TVS games in Phoenix. WGN-TV carried the WFL in Chicago, but those may have been just local telecasts of the Fire/Winds.