UNIONDALE, N.Y. — Missing Kyle Okposo on their top line and scuffling to manufacture goals, the Islanders continue to win with the grit and determination embodied by their fourth line of center Casey Cizikas and wings Matt Martin and Colin McDonald.

Two years ago, Cizikas, Martin and McDonald were especially effective for the Islanders in the playoffs against Pittsburgh, driving Penguins goaltender Marc-Andre Fleury to distraction with their frenetic energy.

All three players paid their dues at Bridgeport in the American Hockey League — McDonald again for most of this season — and their collective work ethic was on full display Tuesday against the Edmonton Oilers when Cizikas scored the winning goal after McDonald’s pass — while lying on the ice — to his linemate in front of the net.

“He plays the Islander way, the team concept we talk about all the time, which is to bring energy and grind it,” Coach Jack Capuano said of McDonald, 30, a favorite among his teammates. “You do those things, and good things happen.”