University of Nevada Las Vegas

UNLV: Transferred to UNLV after attending University of San Francisco (2017-18).

2020: Made eight relief appearances on the mound … Had an ERA of 3.14 and an overall record of 0-0 and one save in 14.1 innings of work … Earned save vs. Creighton (Feb. 28) ... Threw a minimum of 1.0 inning in all eight appearances with a season-best 2.2 on two occasions: vs. Central Michigan (G2/Feb. 14) and vs. Creighton (Feb. 28) ... Struck out nine batters with a season-best three on two occasions: vs. Central Michigan (Feb. 14) and vs. Creighton (Feb. 28) … Limited opponents to one run or fewer in seven of eight occasions … Allowed nine hits and five runs (all earned) … Walked three.

2019: Did not play; redshirt.

2018 San Francisco: Helped the Dons to 28 overall wins, with 15 of those coming in West Coast Conference play … Made a total of 11 appearances with four starts on the mound … Had an ERA of 7.31 and an overall record of 0-2 … Struck out 10 with a season-high three at No. 2 Stanford (May 1) … Allowed 28 hits and 17 runs (13 of which were earned) … Walked nine.
 
High School: A 2017 graduate of Archbishop Mitty HS … Earned All-WCAL honors three times: first team (junior), second team (sophomore) and honorable mention (senior) … As a junior, registered a .346 batting average and a 0.58 ERA … Drafted by the Oakland Athletics in the 2017 MLB Draft.
 
Personal: Haydn King is the son of Matthew and Donya King ... Father, Matthew, played baseball at California and Cal Poly … Mother, Donya, was an All-American swimmer at San Jose State … An uncle, Marc, played baseball at UC Santa Barbara and Cal Poly before playing professionally in the Montreal Expos organization.