Question: are all mlb playoff games best of 7

Answer: No, The Major League Baseball postseason is an elimination tournament held after the conclusion of the MLB regular season. As of 2012, the playoffs for each league--American and National--consist of a one-game wild-card playoff between two wild card teams, two best-of-five Division Series (LDS) featuring the wild-card winner and the winner of each division, and finally the best-of-seven League Championship Series (LCS). The winners of the American League Championship Series (ALCS) and the National League Championship Series (NLCS) play each other in the best-of-seven World Series.