Logo of the Omaha Mammoths, who played in the Fall Experimental Football League for one season in 2014. The FXFL was trying to establish themselves as a developmental league for the NFL, and actually is still trying today. The Mammoths had the league’s best attendance, but were relocated to become the Hudson Valley Fort after one year as the league tried to cut travel costs. The only recognizable names on the team’s roster were Alonzo Highsmith Jr. and wide receiver Gerald Ford, who did not go on to become president.