Staab was raised in San Diego, California. She is part Hawaiian through one grandmother.[2] She played club soccer for the DMCV Sharks in her childhood.[3] She attended Scripps Ranch High School, where she played varsity soccer all four years and captained the team in her last two years.[4]
Staab attended Clemson University, where she played for the Tigers women's soccer team from 2015 to 2018.[4] She was selected for the ACC All-Freshman team in 2015 after starting all 20 games in her first season.[5] After making the All-ACC second team in each of the next two years, she was selected to the All-ACC first team in her senior season.[6] At the time of her graduation, her 33 career assists were tied for 4th-most in school history.[7]
Staab was drafted 4th overall in the first round of the 2019 NWSL College Draft by the Washington Spirit.[6] In April, she was signed to the Spirit's senior roster in advance of the 2019 NWSL season.[8] Staab made her professional debut on April 13, 2019, against Sky Blue FC, scoring a 59th-minute goal en route to a 2–0 season-opening win for the Spirit.[9] Staab went on to appear in every minute of the Spirit's season, becoming the second-ever NWSL player to play every minute of her rookie season. She was considered one of the league's top defenders, earning a spot on the May and June 2019 NWSL Team of the Month and she was one of three nominees for Rookie of the Year.[10][11][12] In 2020, she played every minute of the Spirit's season.[13] In the NWSL Challenge Cup she converted a header off a set piece in the 77th minute against the Portland Thorns, scoring the Spirit's lone goal in the team's 1–1 tie.[14] In 2022, Staab played every minute of the Spirit's season.[15]
On April 29, 2023, Staab made her 73rd consecutive regular season start in the NWSL, breaking a record held by Amber Brooks.[16] As of October 20, 2023, Staab has played every minute of 90 consecutive matches, completing three iron woman seasons.[17] She was nominated for NWSL Defender of the Year in the 2023 season.[18]
Staab attended training camp with the United States under-19 team in January 2016.[21] Staab was first selected for the United States under-23 team in March 2018 for the 2018 Thorns Spring Invitational.[22] She was called up again for the 2018 Nordic Tournament, where she was the only non-professional player selected for the U.S. roster.[23] She started all three games, and scored the game-winning goal for the United States in the final match, ensuring a first-place result in the tournament.[24]
Staab received her first senior national team call-up in May 2024, making her debut as a 61st-minute substitute in a friendly against South Korea on June 1.[25][26]
