During an NCAA college swimming meet, competing against Harvard University in Boston, Massachusetts, Thomas won the Women's 100m and Women's 200m Freestyle races, although the margins were far narrower than in previous races she won in 2021.
Thomas won her 100m race in 50.55 seconds, with her closest competitor coming in at 51.51.
In the 200m race, she won in 1:47.08, with second place being secured at 1:48.44.
Thomas' controversial wins prompted the NCAA to review its guidelines for male-to-female trans athletes on Wednesday. Still, they ultimately washed their hands of the swirling row surrounding transgender athletes in college athletics.
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Under the new guidelines, which were approved by the NCAA Board of Governors, transgender participation for each sport will be determined by the policy for each sport's national governing body.
NCAA rules on transgender athletes yielded to the forefront when Thomas started shattering records late last year.
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She was on the UPenn men's team during her first three years but is now competing on the women's team this season following her transition.
Last month, Thomas put in an astounding performance at the Zippy Invitational Event in Akron, Ohio, that saw her complete the 1,650-yard freestyle 38 seconds ahead of the next closest finisher, teammate Anna Sofia Kalandaze.
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Thomas's winning time was 15:59:71, with her UPenn teammate Ana Kalandaze coming second with a time of 16:37:44.
Thomas's win was a record for the Zippy Meet, and the pool where the event took place. She also managed to smash two U.S. women's swimming records during earlier races at the same event.
With the NCAA taking little decisive action, on Thursday, USA Swimming announced it will release a new policy "shortly" on whether elite trans athletes like Ivy League swimmer Thomas can compete against biologically born women.
The organization, which oversees more than 360,000 members, released a statement Thursday following the NCAA Board of Governors' announcement that they will update their guidelines to follow the wishes of each sport's governing body.
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"USA Swimming firmly believes in inclusivity and the opportunity for all athletes to experience the sport of swimming in a manner consistent with their gender identity and expression," the statement reads.
"We also strongly believe in competitive equity, and, like many, are doing our best to learn and educate ourselves on the appropriate balance in this space."
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