Howard Bruce Sutter was an American professional baseball pitcher who played 12 seasons in Major League Baseball (MLB) between 1976 and 1988. He was one of the sport's dominant relievers in the late 1970s and early 1980s, making effective use of the split-finger fastball. A six-time All-Star and 1982 World Series champion, Sutter recorded a 2.83 career earned run average and 300 saves, the third-most in MLB history at the time of his retirement. Sutter won the National League's (NL) Cy Young Award in 1979 as its top pitcher, and won the NL Rolaids Relief Man Award four times. He became the only pitcher to lead the NL in saves five times.

In baseball and softball, a relief pitcher or reliever is a pitcher who pitches in the game after the starting pitcher has been removed because of fatigue, ineffectiveness, injury, or ejection, or for other strategic reasons, such as inclement weather delays or pinch hitter substitutions. Relief pitchers are further divided informally into various roles, such as closers, setup men, middle relief pitchers, left/right-handed specialists, and long relievers. Whereas starting pitchers usually throw so many pitches in a single game that they must rest several days before pitching in another, relief pitchers are expected to be more flexible and typically pitch in more games with a shorter time period between pitching appearances but with fewer innings pitched per appearance. A team's staff of relievers is normally referred to metonymically as a team's bullpen, which refers to the area where the relievers sit during games, and where they warm-up prior to entering the game.