In sport, a whitewash or sweep is a series in which a person or team wins every game, or when a player or team wins a match to-nil. Usage by sport Baseball In Major League Baseball, teams typically play multiple games against each other; if one team wins all the games in that series, it is considered a "series sweep", or, more commonly, simply a "sweep". In many cases, fans of the team in the favoured position, when all but one contest in the current series have been won, will bring brooms (either real brooms or large props for better visibility) to the ballpark with which to taunt the losing team. On rare occasions, a "season sweep" can be accomplished, in which every contest between two teams is won by the same team. Intra-division season sweeps are relatively rare, since with the relatively large number of games against intra-division teams (19 per divisional matchup), the division rivals are more likely to find at least one lucky matchup. In cases where two teams only play each other once in the season, there is no distinction made between a series and season sweep. Basketball The NBA Playoffs comprises four rounds of best-of-seven series; any team that wins the first four games of a playoff series would have accomplished a series sweep. However, in early playoff seasons, there were two game sweeps in a best-of three series. And in later years, there were three game sweeps in a best-of-five series. The first sweep in NBA playoffs history was in 1948 by the Baltimore Bullets. Since the establishment of the National Basketball Association, 182 playoff series have been swept. Nine of which occurred in the NBA Finals. The most recent NBA Playoff sweep was recorded by the Boston Celtics, in 2022, against the Brooklyn Nets. The Los Angeles Lakers hold the most series sweeps in NBA Playoff history, with 31. Cricket In cricket, a whitewash is when a team wins all the matches played in a series of at least 3 matches. Ice hockey The Stanley Cup Playoffs comprises four rounds of best-of-seven series; any team that wins the first four games of a playoff series would have accomplished a series sweep. The Stanley Cup Finals became a best-of-seven series in 1939; since that year, there have been nineteen occasions where the cup was decided in four games: , , , , , ,