All The Babes
Mal O'Brien
Also known as Mallory O'Brien
- Born
- Jan 1, 2004age 22
- height
- 5'3" (or 160 cm)
- nationality
- American
Career
Active 2018 – present
Biography
About Mal O'Brien
Mal O'Brien is an American CrossFit athlete and influencer. She was born in Iowa, United States, and began her career in 2018 when she was about 14 years old. Her rise was rapid. In 2021, at age 17, she was named CrossFit's Rookie of the Year. The next year, she became the youngest person ever to win the CrossFit Open, and later that year, at age 18, she finished second at the 2022 CrossFit Games, making her the youngest person to ever step onto a Games podium. As of early 2024, she has built a following of over 700,000 on Instagram. She continues to compete and create content for her fans.
Record
Profile details
Personal
- Years Active
- 2018-present (started around 14 years old; 8 years active)
- Birthplace
- Iowa, United States
- Ethnicity
- Caucasian
Body
- Weight
- 135 lbs (or 61 kg)
Extra
- Instagram Followers
- 591k (as of April 2026)
Frequently asked
How did Mal O'Brien make CrossFit history in 2022?
In 2022, she won the CrossFit Open (the youngest ever to do so) and then placed second at the CrossFit Games, becoming the youngest person to podium at the Games.
What is Mal O'Brien's height and weight?
She stands 5'3" (160 cm) and weighs 135 lbs (61 kg), which is notable given her success in a sport often dominated by taller athletes.
Did you know
- Mal O'Brien started competing in CrossFit at age 14, about four years before her history-making 2022 season.
- She was named CrossFit's Rookie of the Year in 2021, a year before her podium finish at the Games.
- Her Instagram following had grown to over 719,000 by January 2024.
More American Influencer profiles
Help improve this profile
Spot something wrong or missing? Fix a detail, add a link, or share a fact. Every submission is reviewed before it goes live.
Are you Mal O'Brien?