No, Joe Namath is not starting for the American Football League (AFL) today. It is defunct, you see.
The Arizona Fall League starts today - the non-defunct AFL.
Mets represented on the Scottsdale Scorpions roster as of late month included:
The Arizona Fall League teams are each affiliated with five separate Major League teams; each affiliated Major League team provides seven players who team up to fill the 35-man roster of each team. Additionally, teams may elect to send Taxi Squad players who are only eligible on Wednesdays and Saturdays. MLB teams also provide managers, coaches, and trainers."