par-4 1st to win the championship. At , Irwin became the oldest winner of the U.S. Open, surpassing the record set in 1986 by Raymond Floyd by fifteen months. The oldest winner of a major is Phil Mickelson, 50 at the PGA Championship in 2021. Curtis Strange attempted to win his third consecutive U.S. Open; he began the final round just two off the lead, but a final round 75 dropped him back to 21st place. Amateurs Phil Mickelson and David Duval made their major championship debuts, finishing in 29th and 56th place, respectively. Scoring conditions were ideal throughout the week, with a record 39 under-par rounds in the first round and 47 in the second. A total of 28 players finished the tournament under-par, a new U.S. Open record. Past champions in the field Made the cut Missed the cut Source: Round summaries First round Thursday, June 14, 1990 Second round Friday, June 15, 1990 Amateurs: Duval (E), Mickelson (+1). Third round Saturday, June 16, 1990 Final round Sunday, June 17, 1990 Amateurs: Phil Mickelson (E), David Duval (+5). Scorecard Final round Cumulative tournament scores, relative to par Source: Playoff Monday, June 18, 1990 Irwin and Donald tied in the 18-hole playoff at 74 (+2). The sudden-death playoff began on hole #1 (385 yd., par 4), which Irwin (3) birdied and Donald (x) did not. Scorecard {|class="wikitable" span = 50 style="font-size:85%; |- |style="background: Pink;" width=10| |Birdie |style="background: PaleGreen;" width=10| |Bogey |} Source: References External links USGA Championship Database U.S. Open (golf) Golf in Illinois Medinah, Illinois U.S. Open U.S. Open (golf) U.S. Open U.S. Open