In her freshman year, Davidson started all 21 games for the Cardinal and was named to the Pac-12 All Freshman team and the All-Pac-12 Second Team. In 2017, Davidson was named Pac-12 Defensive Player of the Year. She was a key part of the Stanford team that won the2017 NCAA Division I Women's Soccer Tournament and was named the 2017 College Cup Most Outstanding Defensive Player.[4] In 2018 Davidson only appeared in 3 games for Stanford as she suffered a fractured ankle on September 9 againstNorth Carolina.[5] This would be her final appearance for Stanford as she declared for the2019 NWSL College Draft, forgoing her final year of college eligibility.[6]
In November 2018, theNational Women's Soccer League changed the rules for theNWSL College Draft to allow for players to enter the draft before they had exhausted their college eligibility.[7] This allowed Davidson to declare for the2019 NWSL College Draft after only playing three years atStanford. Davidson was selected 1st overall at thedraft by theChicago Red Stars, she was the second consecutive Cardinal to be selected 1st overall afterAndi Sullivan was the 1st overall pick in2018.[8] On March 11, 2019, Davidson signed a contract with the Red Stars.[9]
Davidson suffered an ACL injury in March 2022, causing her to miss the remainder of the2022 NWSL season.[10]
Upon becoming an unrestricted free agent, Davidson signed a three-year contract with Gotham FC on January 2, 2024, to play through 2026.[11] Davidson made her debut for Gotham on March 15, 2024, in the2024 NWSL Challenge Cup.[12] On November 10, she scored the opening goal againstPortland Thorns FC in the NWSL quarterfinals; Gotham FC would go on to win the match, 2–1.[13][14] Davidson started in the team's semi-final match, where Gotham lost onpenalties to theWashington Spirit.[15][16]
Ahead of her second season with Gotham FC, Davidson's teammates voted her to be named the clubcaptain.[17][18] She started each of Gotham's first three regular season matches[19] before going down with an injury in the 40th minute of the third fixture, a 0–0 draw with theHouston Dash.[20] On April 2, 2025, Gotham FC announced that Davidson would miss the remainder of the season with a torn ACL, her second ACL injury in three years.[21][10]
In 2018 Davidson played for both the seniorUSWNT and theU-20 WNT. She received her first senior cap on January 21, 2018, in a friendly againstDenmark. After the match, she joined the U-20 squad in Trinidad & Tobago for the2018 CONCACAF U-20 Championship.[22] Davidson scored the tying goal in the final againstMexico, but the United States lost on penalty kicks.[23]
Davidson was not part of the final roster for the2018 FIFA U-20 World Cup as she had continued to receive call-ups to the senior national team. On July 18 she was named to the USWNT roster for the2018 Tournament of Nations.[24]
After recovering from injury, Davidson returned to the USWNT in January 2019 and was named to the roster for the2019 SheBelieves Cup in February.[28]
In May 2019, Davidson was named to the final 23-player squad for the2019 FIFA World Cup. She was the youngest player on the roster and became the 6th ever under-21 player to start at a World Cup game for the USWNT after being named to the United States' starting lineup for their second group stage match.[29][30] During her World Cup debut, Davidson assistedJulie Ertz andCarli Lloyd for the second and third goals of a 3–0 victory overChile.[31]
Davidson made her international return from her ACL injury in April 2023, playing in the final match before the announcement of the USWNT's2023 FIFA Women's World Cup roster.[33] Ultimately, she was not selected to the USWNT's squad for the tournament.[34]
In February 2024, Davidson was named to the USWNT'sCONCACAF W Gold Cup pre-tournament camp and roster.[35] She started in the USWNT's match against Argentina[36] and Colombia.[37]
In June 2024, Davidson was selected to the 18-player roster for the2024 Summer Olympics in France.[38] She started the USWNT's first two matches but picked up a knee contusion in a group stage match versusGermany,[39] forcing her to miss the next two matches of the tournament.[40] Davidson then returned to the starting lineup in the USWNT's semi-final and gold medal fixtures. In both games, she was substituted off for club teammateEmily Sonnett later in the match.[41][42] The United States would go on to win gold, beatingBrazil 1–0 on a goal fromMallory Swanson.[43]