King played all four years of collegiate baseball at Division I UC Irvine from 2020 to 2023. He appeared in just four games in his first season before taking off in 2021 as he posted a 1.98 ERA, appearing in 29 games as a relief pitcher, striking out 45 batters, and earning eight saves. After the season, he was named Perfect Game USA Third Team All-American, Collegiate Baseball Newspaper Freshman All-American, and All-Big West First Team. In 2022, King made 24 appearances on the mound, as he finished the year with a 5.56 ERA, with 29 punchouts. He spent the summer of 2022 in Alaska as he took home the Alaska Baseball League championship with the Anchorage Glacier Pilots while holding an impressive 2.51 ERA in 15 relief appearances, as he secured eight saves. In his final season at UC Irvine, King made 28 appearances out of the bullpen as he held a 3.41 ERA, striking out a career-high 55 batters, and completing the year with eight saves. After an incredible college career, King signed with the Minnesota Twins in 2023. He appeared in two games in the Florida Complex League for the Twins in 2023, as he pitched 1.2 innings. He played in the FCL again in 2024, as he played in one game, making a start as he pitched 0.2 innings. He spent the fall of 2024 in the Arizona Fall League with the Salt River Rafters, pitching in eight games as he held a 7.71 ERA in 9.1 Innings pitched while he struck out 10 batters.