Jack Nicklaus is the only other player to have completed any era's Career Senior Grand Slam, doing so in his first two years on the Senior Tour. In his first year of eligibility in 1990, he won The Tradition and the Senior Players Championship. The next year, he defended his Tradition title and went on to win the Senior PGA and U.S. Senior Open. However, he failed to defend his Senior Players title and thus missed out on a calendar-year Grand Slam.