At 17 years old, Mallory O’Brien became the youngest athlete to win an individual CrossFit Games event.

O’Brien earned her first Games career event win by performing a total of 55 unbroken thrusters at 135 lb and 55 touch-and-go wall walks in a descending rep scheme from 10 to 1.

Watch O’Brien dominate the field in this replay of Individual Event 4 from the 2021 CrossFit Games.

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