Earned his first U.S. Open start as the runner-up to Doc Redman in the 2017 U.S. Amateur Championship at The Riviera Country Club. Ghim held a 2-up lead with two to play, only to see Redman eagle the 35th hole and birdie the 36th hole to force extra holes. He eventually conceded Redman's birdie putt on the first extra hole. The University of Texas All-American also was the runner-up to Byron Meth in the final U.S. Amateur Public Links Championship in 2014, ironically a match that also went 37 holes. In April, Ghim earned low-amateur honors at The Masters Tournament, registering three eagles and a hole-out birdie from the bunker on his 72nd hole. Member of the victorious 2017 USA Walker Cup Team, where he posted a 4-0-0 record. Semifinalist in the 2013 U.S. Junior, losing to future University of Texas teammate and eventual champion Scottie Scheffler. Won the 2017 Pacific Coast Amateur and was a member of the 2016 and 2017 USA Palmer Cup Teams.
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