MasterCard helped bring Apple Pay to the PGA Tour during the Phoenix Open in January. Fans attending the Arnold Palmer Invitational will be able to use the contactless payment system to buy both food and merchandise, according to Business Wire:

Golf fans will now have access to faster and more secure ways to pay at concession and merchandise point of sale terminals throughout Bay Hill where MasterCard is enabling acceptance of chip cards, contactless payments, and QkR! with MasterPass. This means spectators can take advantage of the latest payment technologies, including Apple Pay.

QkR! with MasterPass is a mobile payment app that lets you pay with your MasterCard debit or credit card at participating merchants. The app is powered by MasterCard's MasterPass, though it accepts all major cards. You can download QkR! with MasterPass from the App Store here. Note that you don't need QkR! in order to use ApplePay with your MasterCard.

Apple Pay is currently available on the iPhone 6 and iPhone 6 Plus. Beginning next month, owners of the iPhone 5, 5c, and 5s will be able to utilize the system when connected to an Apple Watch.

Source: Business Wire