The World Football League affilliates I watched 1974 WFL games were on WDCA-TV 20 - Washington DC, and WBFF-TV 45 in Baltimore, MD.
WDCA TV 20 did show one WFL game I know of in 1975. They aired a Philadelphia Bell game. It was the Bell against the Jacksonville Express from the Gator Bowl. WDCA TV 20 was scheduled to show a prior game of the Bell playing the Memphis Southmen led by Larry Csonka, but it did not air. I was actually sitting in front of the TV with my cassette player ready to record an audio copy of the game.
Checkout the "WFL on TVS" page on my World Football League Web site:
World Football League - www.worldfootballleague.org