Manley was selected with the 3rd pick of the 2012 Major League Lacrosse Collegiate Draft by the Rochester Rattlers.
During the 2014 season Manley scored 8 goals while obtaining a single assist and 37 ground balls good enough to earn the 2014 Warrior Defensive Player of the Year award.
Manley's 2015 season was cut off short due to a season-ending injury and only appeared in 5 games where he picked up 25 ground balls and obtained a single assist.
[3] Manley played for the Wings for two seasons appearing in 31 games while managing to gather 10 points and 127 loose balls.
[8] Manley was a five-year letterman at Penn Yan Academy, where he went on to play in the state finals as a freshman, and the semi-finals as a sophomore, junior and senior.