Tim Zaleski was ranked by 247 Sports as the No. 83 overall recruit in the state of Illinois in the 2017 recruiting class. He was a Special Mention selection to the 81st Annual Champaign News-Gazette All-State Football Team for all classifications. The Chicago Tribune also named him to their Special Mention All-State Team. Zaleski helped lead St. Rita High of Chicago to the First Round of the 2016 Illinois Class 7A State Playoffs. He averaged 38.3 yards per punt as a high school senior, punting 27 times for 1,033 yards, with a long punt of 59 yards. An outstanding all-around player, Zaleski also caught 39 passes for 720 yards and had 10 receiving touchdowns from his tight end position. As a three-year starter, he averaged 35.6 yards per punt, punting 120 times for 4,269 yards, a long punt of 67 yards and placed five punts inside opponents' 20-yard lines. His career receiving totals included 62 receptions for 1,038 yards and 12 receiving TDs. Zaleski played for head coach Todd Kuska.
Zaleski was also recruited by Air Force, Army, Iowa and Northern Illinois.