Recipient of the 2024 Michael Carter “Junior” Memorial Award at the Arnold Palmer Cup. The award is presented to the Arnold Palmer Cup participant from each team who best represents the qualities and ideals of Michael Carter, a former Penn State golfer and Arnold Palmer Cup intern who tragically died in an automobile accident at 19 years old. Previous recipients of the award include Michael Thompson (2008), Russell Henley (2011), Maverick McNealy (2017), and Collin Morikawa (2018).

Father, Boyd Summerhays, made 24 PGA TOUR starts from 2004-06 and went on to a successful career as a teaching professional, having been recognized as a Golf Digest Top 50 Teacher in America and a Golf Magazine Top 100 instructor.

Younger sister, Grace, played four seasons (2021-25) on the Arizona State women’s golf team; she was a 2023 All-Pac-12 Conference First Team selection, and the 2025 Big 12 Conference Women’s Golf Scholar-Athlete of the Year. Grace also qualified for the 2023 U.S. Women's Open and won the 2020 Utah Women’s State Amateur at age 16, becoming the youngest winner in the event’s history. Grace previously qualified for the 2019 Utah Men’s State Amateur at age 14; she was the fourth female qualifier in history, and the youngest of those four to accomplish the feat.

Preston and Grace, along with their mother, Barbara, all graduated from Arizona State together in 2025. Preston and Grace earned bachelor’s degrees in communications, while Barbara earned a master’s degree in liberal studies with a focus on religious studies.

Uncle, Daniel Summerhays (Boyd’s younger brother), played eight consecutive seasons on the PGA TOUR (2011-18) and won on the Korn Ferry Tour.

Finished No. 7 in the 2025 PGA TOUR University Ranking, earning exempt Korn Ferry Tour membership for the remainder of the 2025 season (top 10 from 2025 PGA TOUR University Eligibility Ranking), as well as an exemption into Second Stage of 2025 PGA TOUR Q-School presented by Korn Ferry (Nos. 6-25 from 2025 PGA TOUR University Eligibility Ranking).

Played four seasons at Arizona State University (2021-25), where he earned four collegiate victories and garnered two All-America honors, including a first-team laurel in 2023. Notably won the 2021 East Lake Cup and 2023 Sahalee Players Championship, with the latter victory earning him an exemption for the 2023 Procore Championship (finished T56) on the PGA TOUR.

As a freshman, was named the 2022 Pac-12 Conference Freshman of the Year and helped Arizona State to a runner-up finish at the 2022 NCAA Championship. Summerhays defeated future PGA TOUR winner Chris Gotterup of Oklahoma in his quarterfinals match, followed by a win over future PGA TOUR winner Joe Highsmith of Pepperdine in the semifinals. Fell to Pierceson Coody of Texas in the championship round.

Represented the United States at the 2023 Walker Cup, contested at The Old Course at St. Andrews, as well as the 2023 and 2024 Arnold Palmer Cups.

Won the 2022 Sunnehanna Amateur, joining a list of past champions which includes Ben Crenshaw (1973), John Cook (1979), Brad Faxon (1982), Lucas Glover (2001), Webb Simpson (2006), Rickie Fowler (2007, 2008), and Collin Morikawa (2016).

Won the 2019 U.S. Junior Amateur Championship at Inverness Club in Toledo, Ohio, two days shy of his 17th birthday. Path to the title included wins over Akshay Bhatia (Round of 16), Austin Greaser (quarterfinals), and Bo Jin (championship match). The victory earned him an exemption for the 2020 U.S. Open at Winged Foot Golf Club, where he missed the cut in his PGA TOUR debut.

Represented the United States team captained by 12-time PGA TOUR winner Justin Leonard at the 2019 Junior Presidents Cup. Teammates included Michael Thorbjorsen, who finished No. 1 in the 2024 PGA TOUR University Ranking. Helped the United States defeat an International Team led by future PGA TOUR winner Karl Vilips and Christo Lamprecht.

Won back-to-back Utah Men’s State Amateurs in 2018 and 2019; he won the 2018 title at just 15 years old, making him the youngest winner in the event’s history.

Earned an exemption for the PGA TOUR's 2021 Barbasol Championship (missed cut) by virtue of his victory at the 2021 Barbasol Junior Championship.