Beauvillier scored the game-winning goal in overtime and added an assist in Saturday's 3-2 victory over the Sabres.
Beauvillier netted a goal on two shots with two PIM in Monday's 4-1 win over the Red Wings.
Beauvillier scored two goals, including the game-tying goal, and had five shots in Saturday's 4-3 shootout win over the Flyers.
Beauvillier (illness) returned to practice Friday.
Beauvillier wasn't able to practice Thursday due to an illness, Andrew Gross of Newsday reports.
Beauvillier picked up two assists in Saturday's 3-2 overtime win over the Blue Jackets.
Beauvillier scored a goal and added an assist in Sunday's 4-1 win over the Jets.
Beauvillier managed an assist and three shots on goal in Friday's 2-1 loss to the Capitals.
Beauvillier scored the game-tying and game-winning goals Friday versus the Red Wings.
Beauvillier secured a two-year contract from the Islanders on Wednesday.