Brooke Mayo (FIFA Assistant Referee)
An MLS Assistant Referee since 2020, and member of the FIFA Panel since 2018, Mayo was appointed to the 2025 FIFA Club World Cup. Mayo worked two Final Round Concacaf World Cup Qualifiers as well as one Concacaf Champions Cup match. She has officiated 24 MLS matches as of November 25 and was the Assistant Referee for the 2025 Lamar Hunt U.S. Open Cup Final.
Kathryn Nesbitt (FIFA Assistant Referee)
An MLS Assistant Referee since 2015, Nesbitt has been a member of the FIFA Panel since 2016 and was appointed to the 2025 FIFA Club World Cup. Nesbitt worked two Final Round Concacaf World Cup Qualifiers as well as Concacaf Champions Cup matches. She has officiated 26 MLS matches as of November 25 and was the Assistant Referee for the 2025 Lamar Hunt U.S. Open Cup.
Alyssa Pennington (FIFA Referee)
Pennington has been on the FIFA Panel since 2023 and was assigned to the FIFA U-17 Women’s World Cup where she officiated the semifinal match. Pennington was the center referee for one Concacaf W Qualifying match, one Concacaf W Champions Cup match, one Concacaf Central American Cup match, one Leagues Cup match and two Concacaf Women’s U-20 Championship contests. She has officiated one MLS game this year, five NWSL and 12 USL Championship matches.
Tori Penso (FIFA Referee)
An MLS Referee since 2020, and a member of the FIFA Panel since 2021, Penso was assigned as a Referee for the 2025 FIFA Club World Cup. She has served as center referee for two Final Round Concacaf World Cup Qualifying matches and worked two Concacaf Champions Cup matches. Penso has officiated 18 MLS games and was the referee for the Lamar Hunt U.S. Open Cup Final.
Natalie Simon (FIFA Referee)
Member of the FIFA Panel since 2022, Simon oversaw the NWSL final in 2025. Simon worked one game each in the 2025 Concacaf Champions Cup, Second Round of Concacaf World Cup Qualifying, Concacaf W Qualifiers and 2025 Leagues Cup. She officiated two MLS games, five NWSL matches and 15 USL Championship games.