Oh Bradley, you still need to be schooled in Golf. The Ryder Cup and the Presidents Cup are two separate entities. The Ryder Cup is held every 2 years, but it alternates being held in Europe and in the USA. This year the Ryder Cup was held in Rome, Italy. Two years from now it will be held in USA, at Bethpage Black, NY. The difference between the 2 events is that Ryder Cup is the US vs. Europe, and the Presidents Cup is the USA vs. an International Team comprised of every international country EXCEPT Europe. The Ryder Cup came first and is the original. It used to be Ryder Cup held in even numbers years and Presidents Cup in odd, but that got thrown off with the COVID pandemic, which is why we now get Ryder Cup in odd years.