Born and raised in Kansas City, Brennan is a former Division I pitcher and highly regarded pitching instructor who has worked with players across multiple competitive levels of baseball.

Brennan began his career starring at Grandview High School. In 2015 he earned 1st Team All-Conference honors and was named Conference Pitcher of the Year.

He continued his career at Johnson County Community College (2015–2017) where he earned Honorable Mention All-Region as a right-handed pitcher before transferring to Abilene Christian University (NCAA Division I). At ACU, Brennan established himself as one of the top relievers in the country. In 2018 he was named an NCAA Closer of the Year Finalist and still holds the Abilene Christian single-season record for saves.

After his playing career was cut short due to injury, Brennan transitioned into coaching and player development. He has coached and instructed at multiple levels and worked with several competitive organizations in the St. Louis area, helping pitchers develop velocity, command, pitch design, and a competitive mentality while also coaching top teams.

Now back in Kansas City, Brennan continues to train and mentor pitchers while coaching at the club level, bringing Division I experience and high-level development knowledge to the next generation of players.

Brennan is available for Pitching Lessons.