sentences:  In the 1960s, Harding Park became a regular stop for the PGA Tour, and produced many big-name winners, including Venturi, Gary Player, and Billy Casper.But by the end of the decade, after the San Francisco Open Invitational in 1969, the PGA Tour left Harding Park, due to deteriorating conditions and antiquated facilities.Course conditions worsened during the 1970s and 1980s, as the city budget cuts wreaked havoc on course maintenance.