While at Harvard, Thomas won 22 conference titles across her three years of athletics in six different events, setting the school and
Ivy League records in the
100 meters,
200 meters and the indoor
60 meters. After Harvard, she moved to
Austin, Texas, to be coached by
Tonja Buford-Bailey. .
2020 In 2020, Thomas was provisionally banned by the
Athletics Integrity Unit after allegedly missing three anti-doping tests within a 12-month period. Her suspension was lifted in July 2020.
2021 In 2021 an
MRI revealed a tumor on her liver, but it turned out to be
benign. She represented the United States in the 200 meter race at the postponed
2020 Tokyo Olympics. Her time of 21.61 seconds at the
United States Olympic trials on June 26, 2021, was the second-fastest ever at the time, surpassed only by world record holder
Florence Griffith-Joyner. The time even surprised Thomas herself; after the race, she said, "It definitely changed how I view myself as a runner. I am still in shock... my dream was to make the Olympic team... Now that I've accomplished [that], I'm going to set higher goals." On August 3, 2021, in the Olympic final, Thomas won a bronze medal, running with a time of 21.87 s, behind
Elaine Thompson-Herah (gold) and
Christine Mboma (silver). Three days later, the U.S. team having qualified for the finals of the
4 × 100 m relay, Thomas ran anchor, and the team came in second place behind the Jamaican team, securing her the silver medal along with teammates
Javianne Oliver,
Teahna Daniels, and
Jenna Prandini. Thomas missed the qualifying for the home
World Championships in
Eugene, Oregon in July as she tore her hamstring just weeks before the
USATF Championships held in June and only finished eighth in the 200 m final.
2023 On April 29 at the Texas Invitational in Austin, Thomas set a personal record in the
400 m with a time of 49.68 s (her previous PR was 51.15 s from May 2021). On July 9, 2023, Thomas became the US national champion for the women's 200m sprint. On August 25, 2023, she claimed the silver medal in the
2023 World Athletics Championships in 21.81 seconds. She finished ahead of USA teammate
Sha'Carri Richardson (21.92), and behind defending women's 200 m world champion
Shericka Jackson (21:41
CR). She won the 200 m at the final pre-Olympic
Diamond League meeting in
London, England, on July 20, with a time of 21.82. At the Olympics, she won only gold medals, including the
200 meter race with a time of 21.82, and along with her teammates in the
4 × 100 m and
4 × 400 m relays. On September 26, she competed at the
Athlos track meet, a women-only track and field meeting at
Icahn Stadium in
New York City, finishing second in the 200 m. In November 2024, it was announced that Thomas had signed up for the inaugural season of the
Michael Johnson founded
Grand Slam Track.
2025 Having finished in third place in the 200m at the
2025 USA Outdoor Track and Field Championships on Aug. 3, Thomas announced in September 2025 that she would not compete at the
2025 World Athletics Championships due to the aggravation of an Achilles tendon injury she had first sustained in May. ==Achievements==