Czeslawski was chosen with the 16th overall pick in the first round. A native of Mount Prospect, Illinois, Czeslawski brings a mix of collegiate and summer league experience to the Boomers pitching staff. He pitched at the University of Illinois Springfield after beginning his collegiate career at North Iowa Area Community College. Czeslawski has appeared in multiple summer leagues throughout his career, gaining valuable innings against strong competition as he continues to develop on the mound.