Phillip Dutton began riding horses on his family farm while growing up in Australia. He moved to the U.S. in 1991 to prepare for the Atlanta 1996 Olympic Games and continued representing his native country until 2006, when he became a U.S. citizen. Dutton has been a mainstay on U.S. teams ever since.

Dutton has competed in every Olympic Games since 1996, winning team gold with Australia in 1996 and 2000, and as a member of the U.S. team in 2008, 2012, 2016, and 2020. He won individual bronze with Mighty Nice at the 2016 Olympics in Rio de Janeiro. He has competed in seven FEI World Equestrian Games, representing the U.S. for the first time in 2006. He won team gold and individual silver at the 2007 Pan American Games with Truluck and team gold at the 2015 Pan American Games with Fernhill Fugitive.

Dutton has been the top-finishing American at the Kentucky Three-Day Event several times, winning the USET Foundation Pinnacle Cup in 2017 with Mr. Medicott, 2015 with Fernhill Cubalawn, 2010 with Woodburn, and 2007 and 2008 with Connaught. In 2008, he was also the overall winner of the event.

Recently, Dutton and Z were fourth at the 2022 Maryland 5 Star CCI5*-L and fifth at the 2023 Land Rover Kentucky Three-Day Event presented by MARS Equestrian^TM CCI5*-L.

Dutton resides in Pennsylvania with his wife Evie, twin daughters, Mary and Olivia, and stepdaughter Lee Lee.

Marilyn Little grew up riding on her family’s Raylyn Farms and began competing at the age of six. She found success in the hunter/jumper discipline, competing in her first grand prix at the age of 16. While Little still competes in the jumper ring, she took up eventing in 2010 and finished her first CCI4* event in 2012. Little has collected numerous placings since her eventing debut, including gold medals at the 2015 Pan American Games. In 2018, she and RF Scandalous won the Red Hills International CIC3*, placed fourth in The Fork/WEG Test Event CIC3*, and placed third in the Land Rover Kentucky Three-Day Event CCI4*. Little will compete in her first WEG in Tryon.

Boyd Martin, the son of Olympic speed skater Toy (Dorgan) Martin and Olympic cross-country skier Ross Martin, began riding at a young age in his native country of Australia. He made his debut at the CCI5*-L with a win at the 2003 Australian International Three-Day Event riding the Thoroughbred gelding True Blue Toozac.

He moved to the U.S. in 2007 to further his career as an eventing professional, serving as the assistant trainer to Olympian Phillip Dutton for two years before starting his own business. Martin began riding for the U.S. in 2009.

Martin is a three-time Olympian, having represented the U.S. in London 2012, Rio de Janeiro 2016, and Tokyo 2020. He is a four-time U.S. Eventing Team member for the FEI Eventing World Championship, including as a part of the silver medal-winning team in 2022 in Pratoni, Italy. With Pancho Villa, he was a member of the U.S. team that won gold at the 2015 Pan American Games, and in 2019, he won team and individual gold at the Pan American Games with Christine, Thomas, and Tommie Turner's Tsetserleg TSF.

Twice, Martin has been the USEF CCI5*-L Eventing National Champion at the Kentucky Three-Day Event. First in 2019 with Tsetserleg TSF and again in 2021 with Christine, Thomas, Tommie, and his own, On Cue. In October 2021, he won the inaugural Maryland 5 Star with On Cue, becoming the first American to win a CCI5* since 2008.

In 2023, Martin piloted his string to several significant top finishes at the CCI5*-L with five top-ten finishes at events around the world, including two top-ten finishes for Fedarman B at both Luhmuhlen and Pau. Martin brought both Fedarman B and Commando 3 forward as potential Olympic selections at the start of the 2024 season. A strong showing of both at the CCI4*-S at the 2024 Kentucky Three-Day Event did not make selection easy, but Martin ultimately chose Fedarman B as his mount of the 2024 Olympic Games, with Commando 3 as a direct reserve. Paris 2024 will be Martin's fourth consecutive Olympic appearance for the U.S. Olympic Eventing Team. 

Martin and Fedarman B were successful in Paris, adding just 1.6 to their initial dressage score of 30.5. The duo were one of only seven combinations to jump clear in both rounds on the final day, finishing tenth individually and contributing to the team's sixth place. 

2025 started off with a win in March on Tsetserleg TSF in the Bouckaert Equestrian Eventing Horse Trials CCI3*-S. This was followed by a podium finish with Fedarman B at both the Carolina International Horse Trials CCI3*-S and CCI4*-S in March and April. He held the top of the podium at the Stable View Horse Trials CCI4*-S with Commando 3 in first and Fedarman B in second. Martin and Commando 3 attended the Defender Kentucky Three Day Event CCI5*-L, where they came in second overall and won the Defender/USEF CCI5*-L Eventing National Championship. It was this performance that led to Martin securing his position as number one on the FEI Eventing World Ranking List, the first time in 20 years since an American has held the top spot.

Martin and his wife, professional dressage trainer and athlete, Silva Martin, own and operate Windurra USA in Pennsylvania.

Lauren Nicholson (née Kieffer) began riding at the age of 6 and competed in her first horse trials at the age of 12. As a high school graduation present, Kieffer participated in a week-long eventing summer camp with Olympians David and Karen O’Connor, which led to a six-year working student position. Her talent and work ethic helped her reach the top levels of the sport and eventually representing the U.S. in multiple international championships.

Nicholson won team bronze in 2005 and team silver in 2007 at the North American Youth Championship (NAYC) with her own Anglo-Arabian gelding, Snooze Alarm. She made her debut at the CCI5*-L level in 2010, when she and Snooze Alarm completed the Rolex Kentucky Three-Day Event. Nicholson continued to have success at the level with Team Rebecca’s Veronica, placing second overall at the Rolex Kentucky Three-Day Event in 2014 and 2016 to win the USEF CCI5*-L National Championship. The pair also had top ten finishes at CCI5*-L competitions at Les Etoiles de Pau (FRA) in 2014, and the MARS Badminton (GBR) in 2018.

Nicholson acquired Snooze Alarm’s full-brother, Vermiculus, as an unbroke young horse and started his career at the beginner novice level in 2012. She brought him up the levels to his first CCI5*-L completion in 2018 at the Land Rover Kentucky Three-Day Event, where they placed fifth. Since then, they’ve had top ten finishes at the CCI5*-L level in 2019 at Defender Kentucky Three Day Event and Defender Burghley Horse Trials (GBR). In 2022 the pair had a top ten finish at Longines Luhmühlen (GER) and were part of the silver-medal-winning team at the 2022 FEI Eventing World Championship held at Pratoni del Vivaro in Rome, Italy. In 2024 at the Defender Kentucky Three Day Event, Nicholson and Jacqueline Mars’ Vermiculus were the highest placed US combination, finished in the top 5 and were named the USEF CCI5*-L Eventing National Champions.

Lynn Symansky began riding at the age of three and competing at the age of five. She grew up as a member of the United States Pony Clubs and earned her A certification. Symansky was competing at the Advance level by the age of 18, and has continued at the top levels of eventing. In 2018, Symansky and her seasoned off-the-track Thoroughbred Donner finished sixth in the Land Rover Kentucky Three-Day Event CCI4*. Symansky also placed second in the MARS Inc. Bromont Three- Day Event CCI3* with Under Suspection and third in the Jersey Fresh International CCI3* with RF Cool Play. Symansky is married to her husband Eric Reed.