Pitcher
Overview
A pitcher (투수, Pitcher) is a member of the defensive team in baseball who receives signals from the catcher and throws the ball to the batter. The pitcher is a core position that determines the start and flow of the game, with the primary task of getting batters out through powerful pitches, precise control, and a variety of breaking balls. In modern baseball, pitchers go beyond simply throwing the ball to stand at the center of game strategy, and are subdivided into various roles such as starter, reliever, and closer.
Main Content
Basic Role and Responsibilities of a Pitcher
The most fundamental duty of a pitcher is to get batters out. To achieve this, pitchers employ various pitch types such as fastballs, curveballs, sliders, and changeups, combining velocity (球速) and control (制球) to disrupt the batter's timing. Additionally, as part of the defense, pitchers must contribute to overall fielding, including handling bunts, throwing pickoffs, and participating in defensive shifts. During the game, they exchange signs with the catcher to exploit the batter's weaknesses and may choose intentional walks or hit-by-pitches depending on the situation.
Types of Pitchers
Pitchers are broadly divided into starters, relief pitchers, and closers based on their role in the game. Starters take the mound from the beginning of the game and aim to cover as many innings as possible, typically 5 to 7 innings. Relief pitchers take over after the starter exits, serving as middle relievers or setup men, while closers enter in the late stages to secure the team's victory. Pitchers are also categorized by pitching style into power pitchers and control pitchers. Power pitchers rely on high-velocity fastballs to rack up strikeouts, while control pitchers use precise command and a diverse array of breaking balls to outwit batters.
Pitching Techniques and Pitch Types
A pitcher's core skills are built on three axes: velocity, control, and breaking balls. The fastball is the most basic yet important pitch, divided into four-seam and two-seam varieties. Four-seam fastballs are characterized by high speed and straight movement, while two-seam fastballs add slight movement to induce ground balls. Breaking balls include curveballs, sliders, changeups, forkballs, splitters, and knuckleballs, each designed to deceive the batter. Recently, new pitch types such as sinkers, cutters, and sweepers have evolved, further diversifying pitchers' arsenals.
Training and Management of Pitchers
Because pitchers place extreme strain on their shoulders and elbows, systematic training and rigorous management are essential. Typically, pitchers combine strength training and flexibility exercises during the offseason, and maintain their skills during the season through bullpen sessions, live batting practice, and video analysis. They also strictly manage pitch counts and rest schedules to prevent injuries. In modern baseball, various metrics (e.g., pitch count, innings pitched, velocity changes) are used to measure pitcher fatigue, and management approaches differ between relievers and starters.
Historical Development
In the early days of baseball, pitchers threw underhand or sidearm, but the allowance of overhand pitching in 1884 led to rapid advancements in velocity and pitch types. Legendary pitchers like Cy Young and Walter Johnson emerged in the early 20th century, and Sandy Koufax dominated the 1960s with overwhelming stuff. From the 1990s onward, power pitchers such as Roger Clemens and Randy Johnson became mainstream, and from the late 2000s, the precision of specific pitches—like Mariano Rivera's cutter and Clayton Kershaw's curveball—began to be emphasized.
Latest Trends
As of 2024-2025, the pitcher position exhibits the following trends. First, velocity inflation continues, with pitchers averaging over 150 km/h on their fastballs becoming common. High-velocity training has become widespread even in minor league and college baseball, leading to an increase in pitchers throwing over 160 km/h in Major League Baseball. Second, the diversification and specialization of breaking balls are notable. The use of sweepers and splitters has surged, with sweepers particularly emerging as a powerful weapon against left-handed batters. Third, data analysis and technology have deeply penetrated pitcher training. Equipment like TrackMan and Rapsodo enables real-time analysis of pitch trajectory, spin rate, and release point, allowing pitchers to train in ways that maximize their strengths. Fourth, the opener strategy has spread. Instead of a starter, a reliever pitches the first 1-2 innings, followed by bullpen pitchers, increasing flexibility in pitcher usage. Fifth, injury prevention and management techniques have advanced. While the success rate of Tommy John surgery (ulnar collateral ligament reconstruction) has improved, rehabilitation programs and pitch count limits to prevent recurrence have become more systematic. These trends are also reflected in the KBO League, where young pitchers actively work on improving velocity and developing breaking balls, and data analysis has become an important criterion when recruiting foreign pitchers.
Related Topics
- [[Baseball]]
- [[Catcher]]
- [[Starting pitcher]]
- [[Relief pitcher]]
- [[Closer (baseball)]]
- [[List of baseball pitches]]
- [[Tommy John surgery]]
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