Sarah Marmelstein

Biography

Sarah Mamelstein, a highly accomplished professional player and 2020 Tokyo Olympian, joined the TCU beach volleyball staff as an assistant coach in July of 2025 and enters her first season with the Horned Frogs. Marmelstein, formerly Sponcil, has had a multitude of experiences on both the national and international stage, both in indoor and beach volleyball. Her accomplishments in the sand are highlighted by her appearance at the 2020 Tokyo Olympic Games on behalf of Team USA. Alongside her partner Kelly Claes the duo made history as the youngest beach volleyball team to ever represent the United States at the Olympics. At 24, Marmelstein was also the second-youngest beach volleyball player to ever represent the Red, White and Blue at the Olympic Games. Her accomplishments don’t stop there, as she also won gold at the AVP Hermosa Beach Open, the FIVB Ostrava Beach Open and the FIVB Beach Volleyball World Tour. Thanks to her success on the AVP Tour in 2022, she was named Defensive Player of the Year, as voted on by her peers. She competed collegiately for both Loyola Marymount and UCLA, and during her time with the Bruins she became a two-time National Champion in 2018 and 2019. With UCLA, she was an All-American and Pair of the Year recipient in 2018. She also competed in indoor volleyball, ranking third in the country in total assists in 2018. At LMU, Marmelstein was named WCC Player of the Year and was an All-WCC First Team Selection. The Phoenix native won gold for Team US