Staff Directory
Marmelstein, Sarah
Sarah Marmelstein
- Title:
- Assistant Coach
- Email:
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 USA at the Four Nations U21 Tournament in Sydney Australia.
Marmelstein also has many proud accomplishments in indoor volleyball, most recently seeing action for the San Diego Mojo, a member of the Pro Volleyball Federation.
With the Mojo in 2025, she appeared in 23 matches and had 342 assists, the third most in a season in the franchise’s history.
Prior to joining the Mojo, she competed for the Grand Rapids Rise and helped them reach the PVF Championship Final.
She also boasts international indoor volleyball accolades, helping Team USA claim silver at the 2024 Women’s NORCECA Pan American Cup in Mexico.
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 USA at the Four Nations U21 Tournament in Sydney Australia.
Marmelstein also has many proud accomplishments in indoor volleyball, most recently seeing action for the San Diego Mojo, a member of the Pro Volleyball Federation.
With the Mojo in 2025, she appeared in 23 matches and had 342 assists, the third most in a season in the franchise’s history.
Prior to joining the Mojo, she competed for the Grand Rapids Rise and helped them reach the PVF Championship Final.
She also boasts international indoor volleyball accolades, helping Team USA claim silver at the 2024 Women’s NORCECA Pan American Cup in Mexico.
Saturdays are for the #frogs
Wednesday, September 10
TCU Football | Sonny Dykes and Players Weekly Press Conference (vs. Abilene Christian)
Tuesday, September 09
on the field with TCU Baseball
Tuesday, September 09
TCU Football | Sonny Dykes and Players Weekly Press Conference (vs. Abilene Christian)
Tuesday, September 09
