St. Clair joins the Riders as the pitching coach after leading a Hub City staff that finished third in the SAL with a 3.50 ERA in 2025.
St. Clair enters his fifth season as a Rangers minor league pitching coach and first at the Double-A level, while also serving as the assistant pitching coordinator in the Rangers farm system in 2026.
Initially, St. Clair came to the Rangers as a coach in the Dominican Summer League in 2022 before serving as a pitching coach for the ACL Rangers from 2022-23. Before professional baseball, he spent two and a half years as pitching coach and recruiting coordinator at North Carolina Wesleyan College.
The right-hander pitched three professional seasons in the St. Louis Cardinals system from 2017-19 after he was picked in the 24th round of the 2017 June draft, making 88 outings for the organization’s Rookie and Single-A affiliates.
The Winston-Salem, North Carolina native played four years (2014-17) at Division II Lenior-Rhyne University in Hickory, N.C.
Hernandez joins the RoughRiders for his first season with the Rangers organization.
During 2020, Hernandez managed the Texas Collegiate League Frisco RoughRiders after the Minor League season had been canceled. In 2025, he served as a bench coach for Triple-A Jacksonville and spent 19 seasons with the Marlins as a coach and coordinator. As part of that stint, he served eight seasons as a manager, most recently in 2022 with High-A Beloit.
Hernandez started his coaching career at the University of Mobile in 1993 as a hitting coach and stayed there through 2001. From there, he coached Texas A&M University-Corpus Christi from 2002-2004 and the University of West Florida in 2006. From 2005-2006, Hernandez served as the hitting coach for the Independent Pensacola Pelicans.
Hernandez attended Troy State, where he helped them to the 1987 DII World Series Championship.
Brown makes his Double-A debut, serving in his third season in the Rangers system.
Before being the athletic trainer for High-A Hub City in 2025, Brown was the ACL Rangers athletic trainer in 2024. He joined the Texas organization in the 2023-24 offseason after completing a student athletic trainer internship with the University of Texas baseball program in 2023.
Brown was also a student athletic trainer at Slinger (Wisc.) High School (2022) and Carroll University in Waukesha, Wisc. (2021). The Louisville, Ky. native holds an associate’s degree in Biology (McHenry County College), a bachelor’s degree in Exercise Science (Upper Iowa University), and a Master’s in Athletic Training (Carroll University).
Additionally, he played four years of college baseball as an infielder and pitcher for McHenry County and Upper Iowa.
Platts joins the RoughRiders for his third season and his fourth in the Rangers organization in 2026.
In his first year, he was the strength and conditioning coach for the Low-A Down East Wood Ducks before spending a season with the Cubs, working in the Dominican Summer League. The Canadian completed his strength and conditioning internship with the University of Iowa athletic department in 2022 and spent four years with the Okotoks Dawgs Baseball Academy from 2019 through 2022.
Platts played two seasons of baseball at Southeastern Community College in Iowa.