While attending the University of Virginia, Shannon led the Cavaliers to win the 2003 NCAA Division I Men's Lacrosse Championship.
In March of the 2008 NLL season, Shannon was traded to the Philadelphia Wings in a series a deals that involved four-teams and six players.
[1] Shannon hit his stride in 2008, putting up his best point total since his rookie season.
Shannon's production would decline in 2009 with injuries, and eventually, finished his career in an injury-plagued 2010 season with Buffalo.
Shannon is a two-time winner of the Minto Cup, Canada's Junior A Lacrosse National Championship, as a member of the Whitby Warriors in 1997 and 1999.