Prohaska arrived at Auburn as an early enrollee and became the starting goalkeeper as a freshman in 2020. She led the Southeastern Conference with an 0.843 save percentage and contributed to 8 clean sheets in 17 starts, earning SEC all-freshman honors. Because the season was disrupted by the COVID-19 pandemic, she received an extra year of eligibility and would play four more years with the team.[2][6] She started all 20 games in her sophomore season and kept 7 clean sheets. In the SEC tournament, South Carolina could only score against Prohaska from the penalty spot as Auburn advanced to the semifinals.[2] In her junior season, she started all 18 games and kept 7 clean sheets.[2]
Prohaska became one of Auburn's captains in her senior season in 2023.[7] She started all 20 games and recorded 7 shutouts (including two combined shutouts) and 1 assist, which came during the SEC tournament.[2] In her graduate season, Prohaska started all 21 games and kept a career-high 12 clean sheets. She helped Auburn reach the second round of the NCAA tournament before falling to her former youth teammates Kailyn Dudukovich and Sydney Jones of Ohio State.[2][8] After five seasons, she left Auburn as the program career leader in clean sheets with 36, third-most in SEC history.[2]
Club career
Seattle Reign
Prohaska joined the Seattle Reign as a non-roster trialist in the 2025 preseason.[9] On March 6, 2025, the Reign announced that she had signed her first professional contract with the club on a one-year deal.[9] She began her rookie season as the third-stringer behind starter Claudia Dickey and veteran backup Cassie Miller, before moving to the gameday bench after Miller sustained a leg injury in May.[10] In July, she made her professional debut in a 2–1 friendly win against the Urawa Red Diamonds.[11] On August 7, the Reign announced that she had signed a one-year extension with the club.[11] She didn't make any league appearances as Dickey was the only goalkeeper the play every minute of the NWSL season.[12]
Racing Louisville
On January 14, 2026, Prohaska was traded to Racing Louisville FC in exchange for US$25,000 in intraleague transfer funds and US$25,000 in allocation money with potential add-ons.[13]
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