The game was scoreless after the first half, but Antonio Lewis broke the stalemate five minutes into the second half off of an assist from Kaden Pulaski.
With six minutes left, Pulaski netted a goal with an assist from Gavin Miller.
Jenison scored in the last minute to cap the scoring.
Goalkeeper Kaden Semlow made 11 saves for the Sailors.
Mona Shores (2-0) travels to Forest Hills Central on Tuesday for non-league play.