Texas Rio Grande Valley Athletics

2025 (Junior): First season with the program. 

2023-24 (St. John's): Mermella played in 54 matches at St. John’s and made two starts at libero. She averaged 0.95 digs per set and totaled 15 assists and seven aces while boasting a .936 reception percentage in 2024. Mermella helped the Johnnies reach the NIVC Fab Four in 2024 and earn back-to-back postseason appearances. St. John’s played for the Big East tournament championship in 2023. 
 
Previously: Mermella was a three-sport standout at Antonian College Preparatory High School in San Antonio, competing in volleyball, basketball and track & field. She was a two-time all-state and all-district first team honoree and earned Academic All-State nods in 2021 and 2022. Mermella was the team MVP and a finalist for Vype Private School Athlete of the Year in 2022 and also made the Express News All-Area Team and Super Team and the Under Armor All-American Watchlist. She played for the San Antonio Lady Stangs Volleyball Club.