Colsey played for the Barrage his entire MLL career, and holds several franchise records, including goals, points and two-pointers.
Before Colsey joined the MLL, he played in the National Lacrosse League (NLL) for nine seasons.
He played for the Rochester Knighthawks, New York Saints, New Jersey / Anaheim Storm and Buffalo Bandits.
After a two-year break, Colsey returned to the NLL briefly in 2007 with the expansion New York Titans.
He is now a physical education teacher at Robert E. Bell Middle School in Chappaqua, New York, where he has taught since 2003 and has coached extensively.