A William Penn Charter School graduate, Castle played collegiate lacrosse with the Drexel Dragons, after transferring from the now-defunct North Carolina State lacrosse program.
[1] While at Drexel, Castle earned all-East Coast Conference honors.
At age 28, Castle joined the Philadelphia Wings for their inaugural season in 1987, playing with well-known lacrosse figures such as Mike French, Henry Ciccarone Jr., and John Grant Sr. Castle's son, George Castle, joined the Wings' inaugural team during its 2009 season.
[2] They are believed to be the first father-son duo to appear as player's in the league's history.
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