Michael Mertz graduated from Pflugerville High School in 2012 and was a two-year letter winner and an all-district performer. Mertz signed a letter of intent to play at Cisco College following his high school career.
During his Freshman year at Cisco, Mertz went 6-5 with a 3.77 ERA in 80 innings. Prior to Sophomore year, Mertz was named as the 18th ranked Junior College player in the country. Sophomore season was eventually cut short after 3 starts due to a season ending injury.
Mertz was recruited by SEC and Big12 schools, among others. Mertz decided to play at Oklahoma State. In 2016, Mertz returned to full health and posted a 4.33 ERA in 52 innings racking up a total of 58 strikeouts. Progressing to postseason that year, Mertz became a Regional and Super Regional champion with OSU earning a birth to the College World Series. That June, he was drafted by the Miami Marlins in the 14th Round.
Finishing his first full season in Class A Greensboro (Miami Marlins Affiliate), Mertz had 40 appearances and had a record of 9-1 with a 1.80 ERA in 75 innings pitched with 78 strikeouts. After his 2018 season, Mertz decided to retire from professional baseball and transfer to coaching full time.
He is currently finishing his Degree in Management with minors in Finance and Sports Management through Oklahoma State University.