PGA Tour players could be banned from skipping playoff events after Rory McIlroy decided to miss the St. Jude Championship.

With his spot near the top of the FedExCup points standings secure, he elected to skip this week’s St. Jude Championship.

He has arrived. World number one and a two-time major winner this year, Scottie Scheffler, the favorite at this week’s FedEx ...