| First base (man) | The first base on the baseball field and the player responsible for defending that position | |
| One-base hit (single) | A hit where the batter successfully runs to first base | |
| Second base (man) | The second base on the baseball field and the player responsible for defending that position | |
| Two-base hit (double) | A hit where the batter successfully runs to second base | |
| Third base (man) | The third base on the baseball field and the player responsible for defending that position | |
| Three-base hit (triple) | A hit where the batter successfully runs to third base | |
| Home base (plate) | The position where the batter hits, also the scoring point | |
| Plate (head) umpire | The main umpire standing behind home plate judging balls and strikes | |
| Base bag | The four fixed white cushions on the field that runners must touch to be safe | |
| Home run / Homer | When a batter scores directly after hitting, usually by hitting the ball over the home run wall | |
| Solo home run | A home run with no runners on base, scoring 1 run | |
| Grand slam home run | A home run with bases loaded, scoring 4 runs | |
| Walk off hit | A hit that decides the game in the last inning | |
| Walk off home run | A home run that decides the game in the last inning | |
| At bat | The number of official batting attempts by a batter | |
| Run batted in (RBI) | The number of times a batter’s hit allows teammates to score | |
| Base on ball | When a pitcher throws four balls, allowing the batter to advance to first base | |
| Four ball | When a pitcher throws four balls, allowing the batter to advance to first base | |
| Walk | When a pitcher throws four balls, allowing the batter to advance to first base | |
| Hit-and-run | A strategy where the runner starts running early and the batter must hit | |
| Run down | When a runner is caught between two defensive positions | |
| Pickle | When a runner is caught between two defensive positions | |
| Intentional walk | A strategy where the pitcher intentionally throws four balls to walk the batter | |
| Wild pitch | A pitch that the catcher cannot catch | |
| Sacrifice fly | A fly ball out that allows a runner to score | |
| Earned run average | A statistic showing the average runs allowed by a pitcher per nine innings | |
| Pitch hitter | A player who substitutes for the original batter in the batting order | |
| Outfielder | A player who defends the outfield area | |
| Relief pitcher | A pitcher who replaces the starting pitcher | |
| Infielder | A player who defends the infield area | |
| Southpaw | A pitcher who throws with their left hand | |
| Screw-armer | A pitcher who throws with their left hand | |
| Left-hander | A pitcher who throws with their left hand | |
| Center | A player who defends the center outfield area | |
| Right-hander | A pitcher who throws with their right hand | |
| Left fielder | A player who defends the left outfield area | |
| Batter | The player currently batting | |
| Right fielder | A player who defends the right outfield area | |
| General manager | The executive responsible for overall team operations | |
| Catcher | The defensive player who catches behind home plate | |
| Pitcher | The player who throws from the pitcher’s mound | |
| Shortstop | The infielder who defends between second and third base | |
| Coacher | The coach who guides runners at first and third base | |
| Middle reliever | A pitcher who substitutes in middle innings | |
| Bull pen | The area where pitchers warm up | |
| Full count | A situation with two strikes and three balls | |
| Base full | When there are runners on first, second, and third base | |
| Base sliding | The action of a runner sliding into a base | |
| Plate | The number of times a batter comes to bat, including walks | |
| Game | The number of games a player participates in | |
| Pitcher’s plate | The elevated mound where the pitcher throws from | |
| Batting average | The percentage of hits divided by at-bats | |
| Game started | The number of times a pitcher starts a game | |
| Save | When a relief pitcher successfully preserves a victory | |
| Blown save | When a relief pitcher fails to preserve a victory | |
| Foul ball | A ball hit into foul territory | |
| Fair ball | A ball hit into fair territory | |
| Ball | A pitch outside the strike zone | |
| Strike | A pitch inside the strike zone | |
| Hit | When a batter successfully reaches base after hitting | |
| Ground ball | A hit where the ball rolls along the ground | |
| Breaking pitch | A pitch with special spin or movement | |
| Hit by pitch | When a pitcher’s throw hits the batter | |
| Curve | A pitch with an arcing movement | |
| Shoot ball | A pitch combining fastball and curve characteristics | |
| Pop-up | A high, short fly ball | |
| Sinker | A pitch that drops sharply | |
| Fast ball | A pitch primarily based on speed | |
| Screwball | A pitch with special spin direction | |
| Liner | A straight, fast pitch | |
| Knuckle ball | A slow pitch thrown with knuckles for irregular rotation | |
| High fly ball | A high, long fly ball | |
| Tip | When the ball slightly grazes the bat | |
| Steal | Running to the next base during the pitcher’s delivery | |
| Complete game | When a pitcher pitches the entire game | |
| Caught stealing | When a runner is caught stealing a base | |
| Designated hitter | A player who only bats and doesn’t play defense | |
| Stolen base | Successfully stealing the next base | |
| Disabled list | A list of players unable to play due to injury | |
| Double steal | When two runners steal bases simultaneously | |
| Forced out | When a defender steps on a base to force out a runner | |
| Double play | Two outs in one offensive play | |
| Triple play | Three outs in one offensive play | |
| Sacrifice hit | A hit that results in an out but achieves a tactical effect | |
| Score ring position | Scoring opportunity with runners on second and third | |
| Lose | The number of games credited as losses for a pitcher | |
| Shutout | When a pitcher completes a game without allowing any runs | |
| Win | The number of games credited as wins for a pitcher | |
| Inning pitched | The number of innings a pitcher throws | |
| Run | When a runner successfully circles the bases and scores | |
| Dead ball | When the umpire declares the game temporarily stopped | |
| Strike zone | The legal pitching area between a batter’s knees and chest | |
| Left on bases | The number of runners who didn’t score | |
| Save point | The number of successful saves by a relief pitcher | |
| Error | A defensive handling mistake | |
| Dugout | The resting area for players beside the field | |
| Take base | When a batter or runner successfully reaches a base | |
| Extra inning | Additional innings after the regular nine innings | |
| On base percentage (OBP) | The probability of a batter reaching base | |
| No-hitter | When a pitcher completes a game without allowing any hits | |
| Assist | Helping create an out on defense | |
| Out | When an offensive player is ruled out | |
| Strike-out | When a batter is struck out by the pitcher | |
| Uncaught third strike | When a batter is struck out but the catcher fails to catch the ball | |
| Earned run | Runs that are the pitcher’s responsibility | |
| Fielding percentage | The probability of successful defense | |
| Short field | The area defended by the shortstop | |
| Balk | An illegal pitching motion | |
| Inside corner | The edge of the strike zone closer to the batter | |
| Outside corner | The edge of the strike zone away from the batter | |
| Winning play | An important play that affects the game’s outcome | |
| Check | A pitcher’s move to prevent base stealing | |
| Control | A pitcher’s ability to control pitch location | |
| Wind-up | A pitcher’s preparation motion before throwing | |
| Pitcher’s foot fault | An illegal stepping motion by the pitcher | |
| Left-handed batter | A batter who holds the bat with their left hand | |
| Right-handed batter | A batter who holds the bat with their right hand | |
| Batter’s box | The area where the batter stands to hit | |
| Batting order | The arrangement of players’ batting sequence | |
| Free pass | Reaching base via walk or hit by pitch | |
| Return to one’s base | When a runner returns to their original base | |
| Heavy batter | A batter with strong hitting power | |
| Swing | The motion of a batter swinging the bat | |
| Back swing | When a batter pulls back an incomplete swing | |
| Hitless | When a batter fails to get a hit | |
| Batting eye | The ability to judge balls and strikes | |
| Base running | The skill of running between bases | |
| Bunt | A tactical hit where the ball is gently tapped | |
| Fielding | The defensive skill of catching the ball | |
| Fumble | A defensive catching error | |
| Inning | The scoring unit of the game, divided into top and bottom | |
| Battery | The combination of pitcher and catcher | |
| Passed ball | When a catcher misses a catchable pitch | |
| Bull pen | The area where pitchers warm up | |
| Base path | The running path between bases | |
| Baseball bat | The bat used by batters to hit | |
| One-handed catch | Catching the ball with one hand | |
| Out-of-bounds | A ball hit outside the playing field | |
| Baseball diamond | The playing field, shaped like a diamond | |
| Sliding catch | A defensive catch made while sliding | |
| Jumping catch | A defensive catch made while jumping | |
| Game ball | The game ball kept after a victory | |
| Perfect game | When a pitcher completes a game with no runners reaching base | |
| Hit a cycle | Hitting all types of hits in one game | |
| Swing & miss | Swinging without hitting the ball | |
| Productive out | An out that achieves a tactical purpose | |
| Unproductive out | An out that achieves no tactical effect | |
| SAC out | A sacrifice out for tactical purposes | |
| SAC fly out | A sacrifice out via fly ball | |
| Fly out | An out from a caught fly ball | |
| Pop out | An out from a caught short fly ball | |
| Ground out | An out from a thrown ground ball | |
| Line out | An out from a caught line drive | |
| Line drive | A ball hit hard and parallel to the ground | |
| Foul out | An out from a caught foul ball | |
| Pick out | An out from a pitcher’s pickoff move | |
| Bunt out | An out from a fielded bunt | |
| Tag out | An out from a defender tagging a runner | |
| Thrown out | An out from being caught stealing | |
