Stefan Frei (born 20 April 1986) is a Swiss professional footballer who plays as a goalkeeper for Major League Soccer club Seattle Sounders FC.

Frei was named MVP at the 2009 MLS Player Combine in Fort Lauderdale, Florida, and signed a Generation Adidas contract.

[5] He made his professional debut on 21 March 2009, in Toronto's first game of the 2009 MLS season against Kansas City Wizards,[6] and soon established himself as the team's first choice goalkeeper.

[citation needed] On 25 April 2010, Frei picked up his first clean sheet of the 2010 season in a 2–0 home win over Seattle Sounders FC.

[10] Frei recorded his first clean sheet of the 2011 season in the second game of the year in a 2–0 home victory over Portland Timbers on 26 March.

On 13 April against Los Angeles Galaxy, Frei wore the captain's armband for the first time with Toronto due to an injury to Santos; the game ended in a 0–0 home draw.

[16] Two weeks later the club announced that Frei would have to undergo surgery to repair ligaments in his left ankle and was expected to be out for four to six months, putting his entire season in jeopardy.

Frei earned his first start in over a year in a Canadian Championship match against Montreal Impact on 24 April 2013; the game ended in a 2–0 home victory for Toronto.

[22][23] On 9 December 2017, he started in the 2017 MLS Cup Final against his former club Toronto FC at BMO Field, a rematch of the previous season's final; Toronto won the match 2–0 to complete an unprecedented treble of the MLS Cup, the Supporters' Shield, and the Canadian Championship, but Frei drew praise in the media for his performance throughout the match, following a string of impressive saves to keep the score level at half time, and made nine stops overall within the first hour of play.

[27] On 10 November 2019, Frei started for Seattle in the 2019 MLS Cup Final, which ended in a 3–1 home win over Toronto FC.

[citation needed] In January 2017, Frei was called into camp for the United States national team by Bruce Arena.