Jonathan played for Firestone High as a pitcher. He was 3 time All City Team 2004-2006 as well as Beacon Journal Player of the Year in 2006. Jon holds the career wins and strikeout records for the Falcons.

Jon pitched 3 years at Ohio Dominican College and was an NAIA All American in 2007 & 2008. He was drafted by the Indians but decided to play his last year at Emery Riddle Univ. After his senior year, Jon was drafted by the Mets in the 19th round and played 2 years in the organization.

Jon played for the Lake Erie Crushers in 2012 before signing with the Blue Jays. Jon went back to the Frontier League and holds the record for most single saves in a season. Jon was named to the Frontier League Hall of Fame in 2021.

Jon has pitched for the Greece National Olympic team since 2016 to present.