Brynn Martinez begins his third professional season and second with the ThunderBolts in 2021. He was acquired in the second round of the 2019 Frontier League draft and led the Bolts that year in games (95), hits (102) and stolen bases (26) while pacing the Frontier League with seven triples. His career began in the United Shore League in 2018, where he hit .218 in 31 games for Utica.
Martinez played collegiately at Quincy University, where he hit .320 over four seasons with 61 stolen bases. He hit .361 as a senior in 2018, whacked six home runs and stole 27 bases. He left Quincy as the Hawks' all-time leader in hits (274) and runs scored (223). He was named All-GLVC four times and All-Region twice. He attended Sagemont High School in Weston, Florida.