I met him at a Minor League game at BayCare Ballpark in Clearwater, Florida in 2021, when the Dunedin Blue Jays, whom he was the development coach for, came to play the Clearwater Threshers.
Zach signed a 2014 Gwinnett Braves Team Set card #24.
https://www.baseball-reference.com/players/s/stewaza01.shtml