MLB Terms Explained: Explore Baseball Terms Glossary & Terminology!

Sep 25, 2025, 12:34 EDT

Learn MLB terms explained with this baseball glossary. Discover batting, pitching, fielding, and stats like RBI, ERA, WAR, and OPS to follow Major League Baseball like a master.

MLB Terms Explained (Credits: Penn State)
MLB Terms Explained (Credits: Penn State)

MLB Terms Explained: From Fenway Park in Boston to Dodger Stadium in Los Angeles, you must understand all the MLB terms, which are essential for following games and analysing stats. Baseball is not just America’s pastime, but it’s a sport that is steeped in history and culture. Whether you are cheering for the Yankees, Cubs, or the reigning World Series champions, let us know that these key baseball terms make the game far more exciting.

List of General Baseball Words

Baseball uses a mix of everyday and unique terms to describe plays, situations, and outcomes. Here are some of the most common general words you’ll hear during any MLB game:

Terms

Meaning

Bases Empty

No runners on any bases.

Bases Loaded

A runner occupies every base; a high-pressure situation.

Dead Ball

Ball is no longer in play, often called by the umpire.

Fair Ball

A batted ball that lands in fair territory.

Foul Ball

A batted ball outside foul lines; counts as a strike unless the batter already has two.

Hit

Batter reaches base safely without an error or fielder’s choice.

Inning

A unit of play consisting of two halves; each team bats once per half.

Lineup

The sequence of batters, which rotates after the ninth spot.

Out

When a batter or runner is retired; three outs end a half-inning.

Pass

A throw between fielders (not pitches).

Pitching

The act of throwing the ball to the batter to try to get them out.

Pitch Clock

Timer that regulates delivery speed to improve pace of play.

Run

When a runner touches all bases and home plate, scoring a point.

Seventh-Inning Stretch

A traditional short break in the middle of the 7th inning, often with fans singing.

List of Parts of the Baseball Field

The baseball diamond and outfield have specific areas, each with a clear role in gameplay. Knowing the field layout helps fans follow plays and strategies more closely:

Part

Meaning

Base

One of three infield bags; runners must touch all to score.

Backstop

Fence or netting behind home plate protecting spectators.

Ballpark

The stadium, including the playing field and stands.

Baseline

Lines connecting bases; also describe player positioning.

Batter’s Box

Painted box where the batter stands at home plate.

Batter’s Eye

Dark backdrop in center field that helps batters see pitches clearly.

Bullpen

Area where pitchers warm up; also refers to relief pitchers.

Catcher’s Box

Marked area where the catcher positions behind home plate.

Centre Field / Left Field / Right Field

Outfield areas beyond the infield.

Coach’s Box

Designated area near first and third base for base coaches.

Diamond

The four-base formation, often referring to the infield.

Fence / Wall

Outfield barrier; balls hit over are home runs.

Foul Lines / Foul Poles

Mark boundaries between fair and foul territory.

Home Plate

Five-sided base where batters hit and runners score.

Infield

The dirt area with bases, pitcher’s mound, and home plate.

On-Deck Circle

Where the next batter warms up before hitting.

Outfield

Grassy area beyond the infield.

Pitcher’s Mound

Elevated dirt mound where the pitcher throws from.

Warning Track

Dirt/gravel strip in front of the outfield fence that signals to fielders that they’re nearing the wall.

Source: MLB

List of Batting Terms in MLB 

Batting is the heart of the offence in MLB. Some key terms include:

  • Home Run (HR): Batter hits the ball out of the park and scores automatically.

  • Runs Batted In (RBI): Measures how many runs a batter contributes.

  • Strikeout (K): Batter misses three strikes or is called out.

  • Walk (BB): Batter advances to first base after four balls.

  • Slugging Percentage (SLG): Ratio measuring a hitter’s power by total bases per at-bat.

Pitching Terms

Pitching defines the pace and intensity of baseball.

  • ERA (Earned Run Average): Average runs a pitcher allows per nine innings.

  • WHIP (Walks + Hits per Inning Pitched): Measures pitcher efficiency.

  • No-Hitter: When a pitcher allows no hits during an entire game.

  • Fastball, Curveball, Slider: Different pitch types with unique speed and movement.

Fielding & Gameplay Terms

Defence often decides close games. Here are a few terms you must know about:

  • Double Play (DP): Recording two outs in a single play.

  • Error (E): Fielder mistake that lets a runner advance.

  • Assist (A): When a fielder helps in recording an out.

  • Designated Hitter (DH): A player bats instead of the pitcher (used mainly in the AL).

  • Extra Innings: Additional innings if the score is tied after nine.

Statistics & Advanced Metrics (Sabermetrics)

Modern baseball relies heavily on analytics:

  • OPS (On-base Plus Slugging): Combines on-base and slugging percentage to measure offensive contribution.

  • WAR (Wins Above Replacement): Estimates a player’s total value compared to a replacement-level player.

Few Examples of Terms in Action

The examples include the following:

  • Aaron Judge hits a home run at Yankee Stadium.

  • José Ramírez drives in 3 RBIs in a single game.

  • Gerrit Cole posts a 2.85 ERA this season.

  • Yankees turn a 6-4-3 double play to end the inning.

  • Shohei Ohtani finishes with an OPS of .980.

You May Also Like:

Cal Raleigh Biography: Home Runs, Biography, MLB Stats & Career!

MLB Playoffs 2025 Picture: Wild Card Standings, Scott & Judge Step Up, Check Now!

NFL Standings & Week 4 Schedule 2025: Scores, News & Key Games

Conclusion

Therefore, learning these baseball terms will help you follow games and appreciate the strategy of MLB. From strikeouts in Yankee Stadium to RBIs in the World Series, mastering this vocabulary brings you closer to the excitement and history of Major League Baseball.

To see more of such stories, you can go ahead and add this site to your preferred sources by clicking here.


Manvi Upadhyaya
Manvi Upadhyaya

Content Writer

    Manvi Upadhyaya is an experienced content writer who is passionate about creating authentic content by delivering credible facts to people. She holds a degree in Journalism and Mass Communication and is fond of art, languages, culture, and education. She has been a published co-author and compiler for many anthology book projects. She creates educational and informative content for international audiences. You can reach out to her at manvi.upadhyaya@jagrannewmedia.com

    ... Read More

    FAQs

    • What is a designated hitter (DH) in the MLB?
      +
      A DH bats in place of the pitcher, mainly in the American League.
    • What is a “no-hitter”?
      +
      A No-Hitter game means that a pitcher doesn’t allow any hits.
    • What does ERA mean?
      +
      Earned Run Average shows how many earned runs a pitcher allows per nine innings.
    • What is an RBI in baseball?
      +
      Runs Batted In (RBI) count how many runs a batter directly scores.

    Trending Tags