Buchnevich netted his fifth goal of the season Thursday in a 4-3 overtime loss to Buffalo.
Buchnevich provided two assists Thursday in a 4-2 loss to Utah.
Buchnevich scored an empty-net goal on two shots and added five PIM in Saturday's 4-2 win over the Maple Leafs.
Buchnevich agreed to terms on a six-year, $48 million contract extension with St. Louis on Tuesday.
Buchnevich supplied a power-play assist in Friday's 5-2 loss to the Hurricanes.
Buchnevich notched three assists in Saturday's 5-4 overtime win over the Wild.
Buchnevich recorded an assist and three shot on net in Saturday's 3-0 win over the Capitals.
Buchnevich tallied a goal and two assists in Thursday's 5-2 win over the Rangers.
Buchnevich (illness) was back at practice ahead of Friday's clash with Colorado, Lou Korac of NHL.com reports.
Per Lou Korac of NHL.com, Buchnevich missed practice Thursday with an illness.