Which event's initial proposal is not a function of the PGA?

The FedEx Cup stands out as it is not an event that originated from the Professional Golfers' Association (PGA). Instead, the FedEx Cup is a season-long points competition introduced by the PGA Tour in 2007, aimed at enhancing the appeal of the Tour's events and incentivizing performance across the entire season.

In contrast, the other events mentioned—the PGA Tour, Senior PGA Championship, and PGA Championship—are all directly associated with the PGA and its mission involving professional golf. The PGA Tour primarily administers professional golf competitions, while the PGA Championship and Senior PGA Championship are prestigious tournaments established under the auspices of the PGA itself.

Thus, understanding the origins and governance of these events highlights why the FedEx Cup is distinct as it is not a function of the PGA.