Capitals defenseman John Carlson reaches a franchise milestone, the Detroit Red Wings trade Mike Green to the Edmonton Oilers. and more in today’s NHL morning coffee headlines.

NHL.COM: The Washington Capitals snapped a four-game losing skid and regained sole possession of first place in the Metropolitan Division by downing the Pittsburgh Penguins 5-3. Carl Hagelin scored twice while John Carlson surpassed Calle Johansson for the most points (475) by a defenseman in Capitals history. Following the game, the Capitals acquired winger Ilya Kovalchuk from the Montreal Canadiens. The Penguins (80 points) sit two points behind the Capitals. Pittsburgh forward Dominik Kahun (leg injury) was a late scratch.

Detroit Red Wings trade Mike Green to the Edmonton Oilers (Photo via NHL Images).

Two goals by Andrew Mangiapane powered the Calgary Flames to a 4-2 win over the Detroit Red Wings. The Flames (70 points) hold the first Western Conference wild-card berth. Dylan Larkin scored twice for the Red Wings, who traded defenseman Mike Green to the Edmonton Oilers following the game for LTIR forward Kyle Brodziak and a conditional draft pick.

SPECTOR’S NOTE: An affordable move by the Oilers, bringing experienced depth to the defense corps as they push to secure a postseason berth. Green isn’t the offensive presence he once was and hasn’t had a good season with the floundering Wings, but his performance could improve with the Oilers.

The conditional pick is a fourth-rounder in the 2020 draft. If the Oilers reach the Western Conference Final and Green plays in half of the games, it becomes a third-rounder in 2021. The Wings also picked up half of Green’s $5.373-million salary-cap hit.

Speaking of the Oilers, Connor McDavid had a goal and two assists in his return from a quad injury as his club doubled up the Los Angeles Kings 4-2. The Oilers (73 points) moved past the Vancouver Canucks into second place in the Pacific Division.

Shea Theodore’s overtime goal lifted the Vegas Golden Knights over the Anaheim Ducks 6-5. William Karlsson tallied a hat trick for the Golden Knights, while Ducks forwards Adam Henrique and Nick Ritchie each scored two goals and collected two assists. The Golden Knights (76 points) opened a three-point lead over the Oilers for first place in the Pacific Division.

The St. Louis Blues picked up their fourth straight win by beating the Minnesota Wild 4-1. With the win, the Blues (82 points) opened a three-point lead over the Colorado Avalanche for the top spot in the Central Division and the Western Conference standings. It was also announced that both clubs will face off in Minnesota in the 2021 NHL Winter Classic at Target Field on New Year’s Day.

Anton Khudobin made 31 saves as the Dallas Stars edged the Chicago Blackhawks 2-1. Tyler Seguin tallied the game-winner for the Stars (78 points), who sit one point behind the Colorado Avalanche for second place in the Central Division.

Buffalo Sabres winger Kyle Okposo scored both goals in his club’s 2-1 victory over the Winnipeg Jets. The win moves the Sabres (66 points) within six points of the Toronto Maple Leafs for third in the Atlantic division. With 69 points, the Jets remain one point out of a wild-card spot in the Western Conference.

Anders Lee scored twice to lead the New York Islanders over the San Jose Sharks 4-1. The Isles (76 points) hold the first wild-card berth in the Eastern Conference.

CBS SPORTS: Carolina Hurricanes defenseman Brett Pesce could be sidelined long-term because of an upper-body injury suffered during Saturday’s win over the Toronto Maple Leafs.

THE SCORE: Speaking of the Hurricanes, they intend to honor David Ayres, the emergecy goalie who backstopped them over the Leafs.

ARIZONA SPORTS: The Coyotes recalled goaltender Darcy Kuemper from his AHL conditioning stint.

SPORTSNET: The Maple Leafs placed forward Dmytro Timashov on waivers.