The Ottawa Senators can win to complete an extraordinary run into the Stanley Cup Playoffs. The Pittsburgh Penguins can win to avoid an unlikely fall from them.
Ottawa will clinch a berth from the Eastern Conference by defeating the Philadelphia Flyers on Saturday.
The Senators and Flyers play at 12:30 p.m., so the Penguins and Boston Bruins will know where they stand before playing at night. If Ottawa wins or gets to overtime, only one of Pittsburgh and Boston can qualify. If the Senators lose in regulation, the Penguins and Bruins each can get in with a victory.
Pittsburgh, 3-9-2 since March 12 and winless in April, plays at the Buffalo Sabres (7 p.m. ET); Boston plays at the Tampa Bay Lightning (7:30 p.m. ET). The Penguins lead the Bruins by one point and would make the playoffs for a ninth straight season with a win.
Ottawa, 22-4-4 since Feb. 10, can finish third in the Atlantic Division with a win and a regulation loss by the Detroit Red Wings at the Carolina Hurricanes.
Almost every other playoff position will be set Saturday.