The Senior PGA is by far the oldest of the senior majors, having been founded in 1937, decades before the establishment of PGA Tour Champions (as the Senior PGA Tour) in 1980. The other events were all founded in the 1980s—the U.S. Senior Open in 1980, the Senior Players Championship in 1983, The Senior Open in 1987, and The Tradition in 1989. This era saw senior golf became a commercial success as the first golf stars of the television era, such as Arnold Palmer and Gary Player, reached their fifties. The Senior Open, however, was not recognized as a U.S. senior major until 2003.