Event: 87th Open championship of the United States Golf Assn., today through Sunday.
Site: Olympic Club in San Francisco, site of the 1955 and 1966 Open championships.
Conditions of play: 18 holes today and Friday with the field cut to the low 60 players and ties, plus any players within 10 shots of the lead, for the final two rounds on Saturday and Sunday.
Television: ESPN will televise today and Friday from noon-2 p.m. and 4-7 p.m. PDT. Channel 7 will provide live coverage on Saturday from 11:30 a.m.-4:30 p.m. PDT and Sunday from 12:30-5 p.m. PDT.
Qualifications for play: Those automatically eligible to play in the U.S. Open include Open champions from the past 10 years; Masters, PGA and British Open champions from the past 5 years; defending U.S. Amateur, Tournament Players, USGA Senior and PGA Club Professional champions; top 15 and ties from last year's Open; top 30 on last year's PGA money list; top 10 on this year's money list and leaders in the European, Japanese, Australian, Asian and South African orders of merit. The remainder of the 150-man field qualifies through sectional and regional tournaments held around the country with a record 5,696 entries originally accepted by the USGA.