By Lee Horton
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First, the Redskins recovered a fumble on the second-half kickoff, and scored three minutes later on a 11-yard touchdown run by Cain.
On the ensuing drive, Cain stepped in front of a pass by Life Christian's Taylor Roelofs and raced down the sidelines for a 47-yard interception return for a touchdown.
Cain's two scores turned a 13-7 halftime lead into a 27-7 advantage for Port Townsend.
King sat out the entire second half with a deep thigh bruise.
Other Saturday scores:
Neah Bay 50, Lopez 0
Crescent 47, Tulalip Heritage 14
Sequim 37, Klahowya 32
North Kitsap 41, Port Angeles 12
Charles Wright 34, Chimacum 15
Forks 23, Rochester 0
Quilcene 60, Highland Christian 0
Lummi 73, Clallam Bay 18