Option declined following 2016 season.
Mannella became TFC's 10th Homegrown player when he turned professional, and became the first captain in Toronto FC II's history when the Reds' reserve team debuted in USL in 2015. Has yet to make his MLS debut but has played for TFC's first team in exhibition matches. Previously served as captain of the KIA Toronto FC Senior Academy Team, where he appeared in 11 matches, scoring two goals and logged 945 minutes this year in the inaugural League 1 Ontario season. Mannella originally joined the KIA Toronto FC Junior Academy Team in 2009 at the age of 15.
INTERNATIONAL: Appeared for Canada's U-23 team in 2015 CONCACAF World Cup qualifying and also earned his senior-squad debut under CanMNT coach Benito Floro's youth movement.