Reilly Smith scored in his preseason debut for Boston after signing on Monday, and Carl Soderberg, Seth Griffith and Daniel Paille also scored for the Bruins (3-2-1). Malcolm Subban made 32 saves.
David Pastrnak, the Bruins’ top draft pick in June coming back from injury, played his first NHL preseason game and assisted on Paille’s third-period goal.
Kyle Okposo scored for the Islanders (4-2-1) in their preseason finale.
Second-year Islanders forward Brock Nelson missed the second half of the second period after a hit from Kevan Miller. Miller received a boarding major and game misconduct, and Okposo scored during the ensuing power play.