Palmer has been considered one of the best pitchers in major-league history. Palmer is the only pitcher in big-league history to win World Series games in three decades (1960s, 1970s, and 1980s). During his 19-year major league career of 575 games (including 17 postseason games), he never surrendered a grand slam, nor did he ever allow back-to-back homers. Palmer's career earned run average (2.856) is the third lowest among starting pitchers whose careers began after the advent of the live-ball era in 1920. In six ALCS and six World Series, he posted an 8–3 record with 90 strikeouts, and an ERA of 2.61 and two shutouts in 17 games.