William Roger Clemens is a former American baseball starting pitcher. Clemens played 24 seasons in Major League Baseball (MLB) for four teams. Clemens was one of the most dominant pitchers in major league history, tallying 354 wins, a 3.12 earned run average (ERA), and 4,672 strikeouts, the third-most all time. An 11-time All-Star and two-time World Series champion, he won seven Cy Young Awards during his career, the most of any pitcher in MLB history. Clemens was known for his fierce competitive nature and for his hard-throwing pitching style that he used to intimidate batters. He is nicknamed "The Rocket."