Zach Esquerra enters his first season with the ThunderBolts in 2015. It is his third year as a pro. Zach signed with Windy City on December 8, 2014. He was originally selected by the Arizona Diamondbacks in the 24th round of the 2013 June Amateur Draft. In two seasons with the Diamondbacks, he rised as high as Class A South Bend, appearing in 131 total games and belting 14 home runs. Esquerra played four years at California Baptist University and hit .328, including .388 as a senior. He had 42 career home runs and 142 RBIs in 177 games, with a .659 slugging percentage, He also attended La Habra High School in California.