2021 Redux:
Best-of-7 NHL/NBA/MLB playoff competition in 2021 produced the Tampa Bay Lightning in the NHL, the Milwaukee Bucks in the NBA, and the Atlanta Braves in MLB as the 2021 champions, in the 23rd year of best-of-7 historical victory probabilities and team performance records coverage by WhoWins™.

Fall 2021 Ouster Board:
start (in Houston [nominal]): 10/15, 8:09pmEDT
--- Semifinals round ---
Boston MLB: 10/22, 11:37pmEDT
Los Angeles Dodgers MLB (MLB Bronze): 10/23, 11:41pmEDT
--- Finals round ---
Houston MLB (MLB Silver): 11/02, 11:32pmEDT
--- Champion ---
Atlanta MLB (MLB Gold): 11/02, 11:32pmEDT

In-Game Comeback of Fall 2021:
On Sunday 31 October, the Houston Astros trailed the host Atlanta Braves by four runs as late as after 1.0 inning, but won 2021 World Series Game 5. In the history of best-of-7 MLB playoff games from 1905 through 2021 World Series Game 4, inclusive, road teams down four runs as late as after 1.0 inning had a game record of only 1-11 (.083) - the Houston Astros thus achieve a grade-A in-game comeback, and (as of 31 October 2021) the greatest in-game comeback thus far in the Fall 2021 best-of-7 MLB playoff season.

Spring 2021 Ouster Board:
start (in Washington NHL): 5/15, 7:25pmEDT
--- Preliminary round ---
St. Louis NHL: 5/23, 7:45pmEDT
Washington NHL: 5/23, 9:43pmEDT
Edmonton NHL: 5/25, 2:05amEDT
Pittsburgh NHL: 5/26, 9:14pmEDT
Florida NHL: 5/26, 10:33pmEDT
Nashville NHL: 5/28, 12:31amEDT
Minnesota NHL: 5/28, 11:47pmEDT
Miami NBA: 5/29, 3:51pmEDT
Toronto NHL: 5/31, 9:32pmEDT
Boston NBA: 6/1, 10:08pmEDT
Washington NBA: 6/2, 9:45pmEDT
New York NBA: 6/2, 10:07pmEDT
Memphis NBA: 6/2, 11:55pmEDT
Portland NBA: 6/3, 10:35pmEDT
Los Angeles Lakers NBA: 6/4, 1:16amEDT
Dallas NBA: 6/6, 6:16pmEDT
--- Quarterfinals round ---
Winnipeg (II) NHL: 6/7, 10:52pmEDT
Carolina NHL: 6/8, 9:04pmEDT
Boston NHL: 6/9, 10:01pmEDT
Colorado NHL: 6/10, 11:43pmEDT
Denver NBA: 6/13, 10:37pmEDT
Utah NBA: 6/19, 12:42amEDT
Brooklyn NBA: 6/19, 11:27pmEDT
Philadelphia NBA: 6/20, 10:37pmEDT
--- Semifinals round ---
Vegas NHL: 6/24, 11:05pmEDT
New York Islanders NHL (NHL Bronze): 6/25, 10:27pmEDT
Los Angeles Clippers NBA: 6/30, 11:46pmEDT
Atlanta NBA (NBA Bronze): 7/3, 10:55pmEDT
--- Finals round ---
Montreal NHL (NHL Silver): 7/7, 10:51pmEDT
Phoenix NBA (NBA Silver): 7/20, 11:43pmEDT
--- Champions ---
Tampa Bay NHL (NHL Gold): 7/7, 10:51pmEDT
Milwaukee NBA (NBA Gold): 7/20, 11:43pmEDT

In-Game Comeback of Spring 2021:
On Friday 18 June, the Los Angeles Clippers trailed the visiting Utah Jazz by 22 points after two quarters, but rallied to win their NBA Quarterfinals Game 6 (and their series). In the history of best-of-7 NBA playoff games beginning in 1947, home teams down 22 points after two quarters had a game record of only 0-6 (.000) - the Los Angeles Clippers thus achieve the reigning best in-game comeback of the Spring 2021 playoff season thus far, as the 22-point halftime deficit surmounted by the Clippers becomes the largest best-of-7 NBA playoff game halftime deficit ever surmounted by a home team for a game victory in the history of best-of-7 NBA playoff games since 1947.

BEST-OF-7 FEATURES
Articles on best-of-7 series phenomena.