As a teenager, Fowler spent two seasons with the Youngstown Phantoms of the United States Hockey League (USHL).
Fowler then went 3–0–0 in the championship round with a 0.64 GAA, .976 save percentage and a 22-save shutout in the final game to help guide the Phantoms to their first Clark Cup in program history.
[12] He was likewise named a AHCA East First Team All-American[17] and selected as a top-three finalist for the Mike Richter Award.
On November 15, 2024, in a game against UConn, he was assessed a match penalty and was ejected after delivering a blocker punch to Huskies forward Tristan Fraser after the foregoing scored a goal against him.
[22] In January 2025, Fowler, along with teammates Ryan Leonard and Gabe Perreault, were longlisted as recipient of the Hobey Baker Award recognizing the top NCAA Division I men's ice hockey player.
[23] Internationally, Fowler first represented Team USA at the 2023 World Junior A Challenge, capturing gold and earned player of the game honors in the championship final.