Instructors
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Bella Matthias
Pitching Instructor
Bella grew up in Greenfield, WI and played at Greenfield High School where she was a three-time All-State, All-Division, All-Conference (POY), Milwaukee Journal Sentinel All-Area selection, and had a record-breaking 1,004 career strikeouts.
After her remarkable high school career, she attended the University of Wisconsin-Whitewater and graduated in December 2020 with an Elementary Education major and Mathematics minor. During her three seasons as a Warhawk, she was a part of three Wisconsin Intercollegiate Athletic Conference regular season championships, two WIAC tournament titles (2017, 2018), and three NCAA Tournament appearances. She was named WIAC Pitcher of the Year in 2017 and 2019, a three-year National Fastpitch Coaches Association Division III All-Great Lakes Region selection, a three-time first team All-WIAC selection, WIAC Pitcher of the Week eight times in her career, and is in the UW-Whitewater program record book in nine different categories. She was also the recipient of the 2020 WIAC Judy Kruckman Softball Scholar-Athlete Award and named UW-W Chancellor's Scholar-Athlete for the 2019-20 year.
Bella is very passionate about growing fastpitch softball and developing athletes to compete at a high level. She has been giving pitching lessons to ages ranging from 6-18 for five years.
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Courtney Ermisch
Catching, Hitting & Fielding Instructor
Courtney graduated from Robert Morris University with a bachelor’s degree in Applied Health Science. She is a dedicated and experienced softball coach who brings both passion and a strong playing background. A proud alumna of Mukwonago High School, she earned First Team All-Conference and All-Region honors in 2015 during a standout senior season.
She enjoys working with catchers as catching was her main position until becoming a utility player. As a utility player, she has gained a deep understanding of every position on the field, giving a unique ability to coach players in all aspects of the game—whether it’s infield, outfield, hitting, or base running.
She now serves as the Head Varsity Softball Coach at her alma mater, where she is committed to building a culture of excellence, discipline, and growth—both on and off the field. She is passionate about helping players grow not just in their skills, but in their love and respect for the game.
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Abby Curtis
Slapping, Hitting & Fielding
Abby is originally from Oshkosh, Wisconsin, where she was a standout player at Oshkosh West High School. During her time there, she earned All-State, All-Division, and was a three-time All-Conference selection in the highly competitive Fox Valley Association (2019, 2021, and 2022).
Abby currently attends Carroll University in Waukesha, Wisconsin, where she is pursuing a degree in Business Administration with minors in Finance, Marketing, and Management. She is on track to graduate in the spring of 2026.
As a key member of the Carroll Pioneers softball team, Abby has earned two All-Conference honors and holds multiple program records, including single-season steals and all-time stolen bases. Heading into her senior season, she brings leadership as a two-time team captain and has been recognized as Pio Athlete of the Week three times. She’s also been nominated for both Rookie of the Year and Player Performer of the Year.
With a career batting average of .367, Abby is a dynamic lead-off lefty slapper and a spark at the top of the Pioneers’ lineup. She is passionate about the game and is dedicated to helping developing players grow into confident, consistent hitters. Abby looks forward to mentoring young athletes and helping them compete at their highest level, both mentally and physically.
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Haley Wynn
Hitting & Fielding Instructor
Haley grew up in Greenfield, WI and played for Whitnall High School where she lead her team to their first WIAA Division 2 State Championship and was named WSFCA Division 2 Player of the Year in 2018. Throughout her high school career she was also NFCA All-Region North utility player, three-time first team All-State, three-time first team All-District, three-time All-Suburban, four-time Woodland first-team all conference, Milwaukee Journal Sentinel Softball Player of the Year, Suburban Player of the Year, two-time Woodland Conference Player of the Year, and holds nine Wisconsin state softball offensive records one of which being 204 career hits.
After her outstanding high school career, she went on to play at NCAA Division I Ball State University. Haley graduated in 2023 with a Bachelor’s in Science in Exercise Science and recently in May of 2025 graduate with a Masters of Arts in Athletic Coaching Education. She played five seasons as a Cardinal, where she was apart of two MAC tournament appearances. She was also named first-team All-MAC (2023), second-team All-MAC (2024), NFCA All-Great Lakes Region Second Team (2023), NFCA All-Great Lakes Region Third Team (2024), and one-time MAC player of the week. Haley’s career at Ball State University has landed her in the softball record book for many offensive categories, one of which is number 4 ranked player for all time career hits with 243. She also exceeded off of the field and was named a Top 25 student, four-time member of the Dean’s List, four-time Academic All-MAC, and a three-time member of CSC Academic All-District Softball Team.
Haley also has experience coaching at the collegiate level, during the fall of 2024 she was a graduate assistant coach for the Ball State softball team as she completed her master’s degree.
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Brooke Balk
Hitting & Fielding Instructor
Brooke graduated from Luther College in December of 2018 with a Bachelor's Degree in Exercise Science and later went on to graduate with a Master of Science Degree in Applied Kinesiology & Physiology from the University of Florida, in 2021. During her two years as a Luther College Norse, she was a part of back-to-back NCAA Division III Softball tournament appearances, a 2017 IIAC Softball Conference Championship, a 2018 IIAC Softball Conference Tournament Championship, was a member of the 2018 NCAA DIII 3rd Place Softball Team, and earned both IIAC Academic All-Conference and NFCA All-American Scholar Athlete honors. Prior to her time at Luther, she played her first two collegiate softball seasons at Saint Cloud State University in Minnesota.
In addition to her competitive playing experience, Brooke also brings with her a growing wealth of softball coaching experience. With coaching experience ranging from the park and recreation level, to the NCAA Division III level, Brooke has worked with softball athletes of many ages and talent levels. Currently, she is the Varsity Head Coach at Oconomowoc High School and will be serving as an assistant coach on our ESA 18U Prospects team for the 2023-24 season. She is also an active member of the National Fastpitch Coaches Association, the Wisconsin Fastpitch Softball Coaches Association and the National Strength and Conditioning Association where she holds her Certified Strength and Conditioning Specialist (CSCS) certification.
Brooke is a Southeastern Wisconsin native, and she currently resides in Big Bend, WI. She is very passionate about growing fastpitch softball in and around her community and loves to give back to the game through coaching. She could not be more excited to be a part of the ESA softball family and looks forward to helping our youth softball players achieve their goals!

