Martinez is 23-years-old and was born in Mission, Texas. He graduated from Palmview High School where he won the 2019 District 31-5A pitcher of the year award. After gaining a bunch of offers, Martinez decided to sign with the Texas State Bobcats. The reliever appeared in 69 games for the Bobcats with none being starts, he had a solid 4.34 ERA, struck out 71 batters, and held opposing hitters to a .259 average.  

The chucker pitched in the MLB draft league this past season with the Mahoning Valley Scrappers where he became a late reliever. Martinez appeared in 16 games and locked down seven saves, he pitched 19.1 innings and struck out 17 batters.