For years, Riley Loos has been a quiet force in American gymnastics and a name known in circles that follow Stanford’s powerhouse program and Team USA’s steady pipeline of talent. But on a crisp night of 23 February in Louisville, with the Winter Cup spotlight glaring, Loos wasn’t just another contender. He was the guy.

With every stuck landing, every precise hold, and every swing through the air, Loos made his presence undeniable, topping the all-around standings with a commanding 160.850. The performance was a statement one and saw him outscore Olympic bronze medalist Fred Richard (159.000) and Nebraska’s Taylor Christopulos (158.400) to claim the Winter Cup 2025 crown.

Who is Riley Loos?

Born on October 6, 2000, in Folsom, California, Riley Loos has built a career in quiet excellence. He’s not one for viral social media moments or flashy interviews; instead, he lets his gymnastics speak for itself. A former Pan American champion and multiple-time national team member, Loos has been grinding at the highest levels for years. His journey took him to Stanford University, where he’s majoring in management science and engineering—because balancing the ring with one of the toughest academic loads in the country is just another challenge he’s willing to take on.

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The 5’5 senior’s record is as solid as his signature still rings strength. In 2023, he finished fifth in the all-around at the U.S. Classic with an 82.019, proving he’s right in the mix with America’s best. He also grabbed a bronze medal on floor exercise (13.733) at the 2023 Baku World Cup in Azerbaijan. He also played a crucial role in securing gold for Team USA at the 2018 Pan American Championships in Lima, Peru.

Whether he’s competing at home or on the world stage, Loos has made it clear. He’s a name you don’t overlook. And then there’s his collegiate dominance. As a senior at Stanford in 2023, Riley Loos helped lead the Cardinals to an NCAA championship while stacking up the MPSF championship. He was also the Nissen-Emery Award finalist in 2023 and a seven-time NCAA All-American.

He finished second in the combined all-around at the Winter Cup with a 161.110, earning top-eight finishes across five events, including a runner-up spot on still rings. That performance was no fluke—earlier in the season, he put up a career-best 14.850 on rings at the Cal Benefit Cup, showing off the kind of raw power and control that separates the good from the elite.

Before college, he was a 2019 graduate of Oak Ridge High School in El Dorado Hills. Off the floor, Loos is just as calculated. His mind works like an engineer’s—because it is one. He’s got a love for data science, a knack for analyzing details, and a dedication to planching (an absurdly difficult bodyweight strength move that screams next-level control). And when he’s not flipping or problem-solving, he’s vibing to songs with a good beat. After all, even a machine like Loos needs rhythm.

Who are Riley Loos’ parents?

Gymnastics might be Loos’ calling, but athleticism runs in the family. Son of Stephanie and father, Greg Loos. Dad Loos was making waves in the water before Riley was sticking landings, competing in water polo at Stanford. That natural competitive fire? It’s in his DNA. With elite coaches like Thom Glielmi and Mark Freeman in his corner, Loos has had the perfect mix of inherited grit and world-class guidance to shape him into the athlete he is today.

Who are Riley Loos’ siblings?

Loos isn’t the only one in the family carrying the competitive spirit. He’s got two sisters, Lexie and Claire. And there’s no doubt that they have been part of the journey. Whether as supporters, motivators, or the ones keeping him grounded through the rollercoaster of elite sports. Because if there’s one thing about family, it’s that they’ll be there. Whether you’re winning the Winter Cup or just trying to survive another brutal day of training.

What are Riley Loos’s achievements?