SIX STATS you might not know about… NHL playoffs (4-game sweeps vs. 7-game series)

Sports Stats ‘on Tapp’ is a sports statistics blog published multiple times weekly focusing on stats that go beyond the numbers.

Stanley Cup, on display at the Hockey Hall of ...

The Stanley Cup (Photo credit: Wikipedia)

The National Hockey League playoffs are underway. Two series, Los Angeles-Vancouver and Pittsburgh-Philadelphia, still have the potential of a four-game sweep as the #8 seed Kings hold a 3-0 series over top-seeded Vancouver, and the Flyers are up three games to none over Pittsburgh. In the other six series, there is still the potential of the teams taking the series to a deciding seventh game.

Following is a stats snapshot of NHL playoff series going back to 1987 (the year all playoff series went to seven games) with a focus on four-game sweeps and series that go to a deciding seventh game.

Conference Quarterfinals

1. Four-game series sweeps: There have been 25 four-game sweeps in the first round of the NHL playoffs since 1987. Teams that win the first round in a four-game sweep won 11 series and lost 14 series in the next round.

2. Seven-game series: There have been 52 seven-game series in the first round of the NHL playoffs since 1987. Teams that win a first-round series in seven games won the next series 23 times and lost the next series 29 times.

Conference Semifinals

3. Four-game sweeps: There have been 18 four-game sweeps in the semifinals since ’87. Teams that won a second-round series by sweeping the opposition went on to win the conference finals 11 times and lost in the conference finals seven times. (The extra rest before the conference finals helped?)

4. Seven-game series: There have been 23 seven-game series in the semifinals since ’87. Teams that won a second-round series in seven games won in the conference finals only six times and lost in the conference finals 17 times. (The fatigue factor of a seven-game series in the semifinals hurt teams in the conference finals?)

Conference Finals

5. Four-game sweeps: There have been six four-game sweeps in the conference finals from 1987-2011. Those six teams went on to win the Stanley Cup three times and lost the Cup three times.

6. Seven-game series: There have been 12 seven-game series in the conference finals from 1987-2011. Eight of the 12 teams went on to win the Stanley Cup; four lost the next series.

Did you know? In the 24 Stanley Cup finals since 1987, eight of the series went the full seven games. In six seasons, the Stanley Cup champion won in a four-game sweep.

Note: In all NHL playoff series from 1987-2011, 55 ended after a four-game sweep; 97 went the full seven games.

Note #2: Last year, the Stanley Cup champion Boston Bruins became the first team in NHL playoff history to win three playoff series by winning a decisive seventh game. Ironically, they won their fourth series (a semifinal series win over the Flyers) with a four-game sweep.

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