MacLean tallied a goal, two shots and three hits during Friday's 5-4 overtime loss to the Capitals.
MacLean's second-period tally snapped an eight-game point drought for the 25-year-old. With Matthew Barzal (upper body) and Anthony Duclair (leg) nearing returns, MacLean could struggle to hang on to a regular role once the Islanders start to get healthy.