At just 19 years old, Sydney McLaughlin has already proven that she can hang in the big leagues (and dominate). The hurdler and sprinter has broken a ton of records, including setting a new world youth best and world junior record for the 400-meter hurdles at the 2016 US Olympic trials, which qualified her for the Rio Olympics. She placed fifth in her semifinal heat but still became the youngest US athlete to compete in a track and field event at the Olympics since 1972. Sydney went professional last year when she signed a multiyear endorsement contract with the New Balance team and is already looking to smash more records — she's definitely one to watch for the 2020 Tokyo Olympics.
Badass Fact: Sydney won the Gatorade National Girls Athlete of the Year award in both 2016 and 2017 — the only athlete to have earned the award twice.