1975 U.S. Open

Archive note

The 1975 edition was won by Lou Graham. Verified venue assignments are published in this record.

Record sources

• 2026 USGA Championships Media Guide - U.S. Open
  • 1975 U.S. Open · Championship identity

    The official 2026 USGA Championship Record Book directly enumerates the completed 1975 Championship, champion, explicit date span, and site in Championship Results: 1895 to 2025. The recorded champion and site preserve the higher-resolution register text. The current official U.S. Open Champions table independently confirms the year, champion, and site.

    Verified 2026-08-20
• USGA dated host record and researched Club identity
  • Course No. 3

    Dated USGA host wording Medinah (Ill.) C.C. (Course No. 3) is explicitly reconciled to Medinah Country Club in Medinah, IL. The dated Course No. 3 qualifier resolves to the existing #3 Course owned by this Club. Dated host authority: https://www.usga.org/content/usga/home-page/media/online-media-center/usga-records/u-s--open-results--1895-to-present.html

    Verified 2026-09-10
• USGA official U.S. Open result
  • Lou Graham

    The official result names the champion and regulation total. Historical playoff status is corroborated by tied regulation totals and extra scores for both winner and runner-up. The 2026 report establishes a one-stroke win on the 72nd hole. Relative score is retained only where explicitly stated.

    Verified 2026-09-10
• USGA: 2026 U.S. Open Record Book
  • John Mahaffey

    PDF page 8, 1975 result: John Mahaffey, regulation total 287 (+3 to par). Playoff scores 73 are separate from the regulation total. The official playoff table on PDF page 10 identifies the winner and runners-up.

    Verified 2026-10-23