Topic Terms

What is a Designated Hitter in Baseball

The designated hitter (DH) is a player who bats in place of the pitcher but does not play a defensive position, allowing teams to use a more powerful offensive player without fielding responsibilities.

The designated hitter (DH) is a player in baseball's batting lineup who bats in place of the pitcher but does not take the field defensively. The DH allows teams to place an offensively focused player — often one who is not an effective fielder or who needs to protect their body — in the lineup while keeping a specialist pitcher who might be a weak hitter off the batting roster.

History of the Designated Hitter

The DH was introduced by the American League (AL) in 1973 as an experiment to increase offense and lengthen pitchers' careers. The National League (NL) resisted adopting the DH until 2020, when MLB adopted a universal DH rule during the COVID-shortened season. The universal DH became permanent in 2022, ending one of baseball's longest intra-league rule differences.

How the DH Works

  • The DH bats in the pitcher's slot in the batting order (usually 4th–6th spot but can be anywhere)
  • The DH never plays defense — they have no fielding responsibilities
  • If the DH takes the field defensively at any point, the team loses the DH and the pitcher must bat
  • If the team uses a position player as a pitcher, they can still keep the DH

Why the DH Matters

Pitchers are historically among the worst hitters on any roster. Even in the pre-universal DH era, the 9th batting spot (occupied by the pitcher in the NL) was called the "automatic out." The DH eliminates this weak spot in the lineup and replaces it with a legitimate offensive threat.

Impact on Strategy

The universal DH has significantly changed tactical decisions:

  • Managers no longer face the classic NL dilemma: "Do I pull my pitcher for a pinch hitter in the 7th?"
  • Double switches are no longer necessary
  • Bullpen usage patterns have changed
  • Small ball and sacrifice bunts are less common

Notable Designated Hitters

The Hall of Fame has historically been reluctant to honor players primarily known as DHs (Edgar Martinez was a controversial multi-year wait). Notable career DHs include:

  • Edgar Martinez — Hall of Fame; career .312 average
  • Harold Baines — Hall of Fame inductee
  • David Ortiz ("Big Papi") — Hall of Fame; Red Sox icon and 3x World Series champion
  • Frank Thomas — Hall of Fame; two-time AL MVP

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