On day two of competition, Weitzeil swam in the final of the 4x100-meter freestyle relay, spitting the fastest 100-meter swim of any of the swimmers on the American relay with a 52.68. She and her relay teammates won the bronze medal with a relay time of 3:32.81 in the final. Weitzeil became the first University of California, Berkeley athlete to win a medal at the 2020 Olympics in any sport.