Before Zagar went professional he played at the local amateur level with East York Soccer Club. He received a scholarship with the University of Toronto and played with the Toronto Varsity Blues, with whom he recorded the most shutouts in a season in 1997, received first-team honours, and was the OUA MVP, as well as the CIAU MVP.
Prior to Zagar's professional career, he participated at the local amateur level with East York Soccer Club. He received a scholarship from the University of Toronto and played for the Toronto Varsity Blues, where he set a record by recording the most shutouts in 1997, earned first-team honors, and was named OUA MVP as well as CIAU MVP.