# 1980 Stanley Cup playoffs

The 1980 Stanley Cup playoffs, the playoff tournament of the National Hockey League (NHL) began on April 8, after the conclusion of the 1979–80 NHL season. This season saw the addition of four teams from the disbanded World Hockey Association (WHA) as expansion franchises, and thus the playoffs were also expanded from 12 to 16 teams. The expanded playoff format allowed two of those former WHA clubs, the Edmonton Oilers and the Hartford Whalers, to make the playoffs in their first season in the NHL. The Atlanta Flames played their final playoff games before moving to Calgary after the season; the playoffs would eventually return to Atlanta in 2007 when the expansion Atlanta Thrashers made their first postseason appearance.
The playoffs concluded on May 24 when the New York Islanders defeated the Philadelphia Flyers 5–4 to win the final series four games to two and win the Stanley Cup. It was the Islanders' first Stanley Cup win and was the first of four consecutive Stanley Cup wins.

## Playoff seeds

With the league expansion from 17 to 21 teams, the playoffs were also expanded, from a 12-team tournament to a 16-team tournament. The sixteen teams were composed of the four divisional champions plus the top 12 finishers of the remaining 17 teams. The 16 qualifying teams were then seeded based on regular season points, with divisional rankings ignored. Division leaders no longer received first round byes. The teams were seeded 1 through 16, with the top team playing the 16th team in the first round, and so on. In subsequent rounds, matchups were similarly arranged, with the top remaining seed against the lowest remaining seed, and so on.
The following sixteen teams qualified for the playoffs:
* Philadelphia Flyers, Patrick Division champions, Clarence Campbell Conference regular season champions, NHL regular season champions – 116 points
* Buffalo Sabres, Adams Division champions, Prince of Wales Conference regular season champions – 110 points
* Montreal Canadiens, Norris Division champions – 107 points
* Boston Bruins – 105 points
* New York Islanders – 91 points
* Minnesota North Stars – 88 points
* Chicago Black Hawks, Smythe Division champions – 87 points
* New York Rangers – 86 points
* Atlanta Flames – 83 points
* St. Louis Blues – 80 points
* Toronto Maple Leafs – 75 points
* Los Angeles Kings – 74 points
* Pittsburgh Penguins – 73 points (30 wins)
* Hartford Whalers – 73 points (27 wins)
* Vancouver Canucks – 70 points
* Edmonton Oilers – 69 points

## Playoff bracket

The NHL used "re-seeding" instead of a fixed bracket playoff system: in each round, the highest remaining seed was matched against the lowest remaining seed, the second-highest remaining seed played the second-lowest remaining seed, and so forth.
Starting this postseason, each series in the Preliminary Round was expanded from a best-of-three format to a best-of-five format. Each series in the other three rounds remained in a best-of-seven format.
| Preliminary Round | Preliminary Round | Preliminary Round | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | | Stanley Cup Finals | Stanley Cup Finals | Stanley Cup Finals |
| 1 | Philadelphia | 3 | | | | | | | | | | |
| 16 | Edmonton | 0 | | | | | | | | | | |
| 16 | Edmonton | 0 | 1 | Philadelphia | 4 | | | | | | | |
| | | | 8 | NY Rangers | 1 | | | | | | | |
| 2 | Buffalo | 3 | 8 | NY Rangers | 1 | | | | | | | |
| 15 | Vancouver | 1 | | | | | | | | | | |
| 15 | Vancouver | 1 | | | | 1 | Philadelphia | 4 | | | | |
| | | | | | | 4 | Minnesota | 1 | | | | |
| 3 | Montreal | 3 | | | | | | | 4 | Minnesota | 1 | | | | |
| 14 | Hartford | 0 | | | | | | | | | | |
| 14 | Hartford | 0 | 2 | Buffalo | 4 | | | | | | | |
| | | | 7 | Chicago | 0 | | | | | | | |
| 4 | Boston | 3 | 7 | Chicago | 0 | | | | | | | |
| 13 | Pittsburgh | 2 | | | | | | | | | | |
| 13 | Pittsburgh | 2 | | | | | | | | 1 | Philadelphia | 2 |
| | | | | | | | | | | 3 | NY Islanders | 4 |
| 5 | NY Islanders | 3 | | | | | | | | | | | 3 | NY Islanders | 4 |
| 12 | Los Angeles | 1 | | | | | | | | | | |
| 12 | Los Angeles | 1 | 3 | Montreal | 3 | | | | | | | |
| | | | 6 | Minnesota | 4 | | | | | | | |
| 6 | Minnesota | 3 | 6 | Minnesota | 4 | | | | | | | |
| 11 | Toronto | 0 | | | | | | | | | | |
| 11 | Toronto | 0 | | | | 2 | Buffalo | 2 | | | | |
| | | | | | | 3 | NY Islanders | 4 | | | | |
| 7 | Chicago | 3 | | | | | | | 3 | NY Islanders | 4 | | | | |
| 10 | St. Louis | 0 | | | | | | | | | | |
| 10 | St. Louis | 0 | 4 | Boston | 1 | | | | | | | |
| | | | 5 | NY Islanders | 4 | | | | | | | |
| 8 | NY Rangers | 3 | 5 | NY Islanders | 4 | | | | | | | |
| 9 | Atlanta | 1 | | | | | | | | | | |

## Preliminary round
### (1) Philadelphia Flyers vs. (16) Edmonton Oilers

This was the first playoff series meeting between these two teams.
* Philadelphia won series 3–0

### (2) Buffalo Sabres vs. (15) Vancouver Canucks

This was the first playoff series meeting between these two teams.
* Buffalo won series 3–1

### (3) Montreal Canadiens vs. (14) Hartford Whalers

This was the first playoff series meeting between these two teams.
* Montreal won series 3–0

### (4) Boston Bruins vs. (13) Pittsburgh Penguins

This was the second playoff series meeting between these two teams. This was a rematch of the previous year's Stanley Cup Quarterfinals, which Boston won in a four-game sweep.
* Boston won series 3–2

### (5) New York Islanders vs. (12) Los Angeles Kings

This was the first playoff series meeting between these two teams.
* New York won series 3–1

### (6) Minnesota North Stars vs. (11) Toronto Maple Leafs

This was the first playoff series meeting between these two teams.
* Minnesota won series 3–0

### (7) Chicago Black Hawks vs. (10) St. Louis Blues

This was the second playoff series meeting between these two teams. Chicago won the only previous meeting in five games in the 1973 Stanley Cup Quarterfinals.
With their victory in Game one, Chicago snapped a record 16-game losing streak in the Stanley Cup playoffs.
* Chicago won series 3–0

### (8) New York Rangers vs. (9) Atlanta Flames

This was the first playoff series meeting between these two teams. Game four was also the final home game for the Flames in Atlanta, as the franchise was sold and relocated to Calgary during the offseason.
* New York won series 3–1

## Quarterfinals
### (1) Philadelphia Flyers vs. (8) New York Rangers

This was the third playoff series meeting between these two teams. Both teams split their previous two meetings. This was a rematch of the previous year's Stanley Cup Quarterfinals, which New York won in five games.
* Philadelphia won series 4–1

### (2) Buffalo Sabres vs. (7) Chicago Black Hawks

This was the second playoff series meeting between these two teams. Buffalo won the only previous meeting in five games in the 1975 Stanley Cup Quarterfinals.
* Buffalo won series 4–0

### (3) Montreal Canadiens vs. (6) Minnesota North Stars

This was the second playoff series meeting between these two teams. Montreal won the only previous meeting in six games in the 1971 Stanley Cup Semifinals. This was Montreal's first playoff series loss since losing to Buffalo in the 1975 Stanley Cup Semifinals.
* Minnesota won series 4–3

### (4) Boston Bruins vs. (5) New York Islanders

This was the first playoff series meeting between these two teams.
* New York won series 4–1

## Semifinals
### (1) Philadelphia Flyers vs. (4) Minnesota North Stars

This was the second playoff series meeting between these two teams. Philadelphia won the only previous meeting in six games in the 1973 Stanley Cup Quarterfinals.
* Philadelphia won series 4–1

### (2) Buffalo Sabres vs. (3) New York Islanders

This was the third playoff series meeting between these two teams. New York won both previous meetings in consecutive years, the latter of which was a four-game sweep in the 1977 Stanley Cup Quarterfinals.
* New York won series 4–2

## Stanley Cup Finals

This was the second playoff series (and only Finals) meeting between these two teams. Philadelphia won the only previous meeting in seven games in the 1975 Stanley Cup Semifinals.
Ken Morrow became the first player in history to win an Olympic Gold Medal and the Stanley Cup in the same season. Game six was the last NHL game to air on American network television for nearly ten years.
* New York won series 4–2