MacArthur is one point away from reaching 40.
He has four goals and three assists in six games.
MacArthur and the Senators are right back at it Sunday in Carolina.
Tuesday's performance could be a good sign for MacArthur fantasy owners after he had gone without a point in his last three games while posting a minus-3 rating.
MacArthur has six points in his last five games after recording five points in his first 10 contests of the season.
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