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A
Acceleration (ACC)
Ace
Adjusted Earned Run Average (ERA+)
Ambidextrous Pitchers
Appeal Plays
Appearance (App)
Arm Strength (ARM)
Around-the-horn
Assist (A)
At-bat (AB)
B
Balk
Balk (BK)
Ballpark Factor
Baltimore Chop
Barrel
Baserunner
Baserunners Per Nine Innings Pitched (MB/9)
Batted Ball Direction (BBD)
Batted Ball Event (BBE)
Batter
Batter's Box
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C
Can of Corn
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D
Dead Ball
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Designated Hitter Rule
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Distance Covered (DCOV)
Doctoring the Baseball
Double (2B)
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E
Earned Run (ER)
Earned Run Average (ERA)
Eephus (EP)
Error (E)
Exchange (XCH)
Exit Velocity (EV)
Expected Batting Average (xBA)
Expected Fielding Independent Pitching (xFIP)
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Expected Weighted On-base Average (xwOBA)
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Extra-base Hit (XBH)
F
Fair Ball
Field Dimensions
Fielder Right of Way
Fielding Independent Pitching (FIP)
Fielding Percentage (FPCT)
First-base Coach
First Baseman
First Step (STEP)
Fly-ball Rate (FB%)
Flyout (AO)
Force Play
Forkball (FO)
Foul Ball
Foul Tip
Four-Seam Fastball (FA)
Free Agency
G
Game Score
Games Finished (GF)
Games Played (G)
Games Started (GS)
General Manager
Generated Velocity (GV)
Grand Slam (GSH)
Ground-ball Rate (GB%)
Ground Into Double Play (GIDP)
Groundout (GO)
Groundout-to-Flyout Ratio (GO/AO)
Ground Rules
Guaranteed Contract
H
Hit (H)
Hit-by-pitch (HBP)
Hit Distance (DST)
Hit Probability
Hits Per Nine Innings (H/9)
Hitting Coach
Hold (HLD)
Home Run (HR)
Home Runs Per Nine Innings (HR/9)
Home Run To Fly Ball Rate (HR/FB)
Home To First
I
Incentive Clause
Infield Fly
Inherited Runner (IR)
Inherited Runs Allowed (IR-A)
Inherited Runs Allowed Percentage (IR-A%)
Innings Per Start (I/GS)
Innings Pitched (IP)
Innings Played (INN)
Intentional Walk (IBB)
International Amateur Free Agency & Bonus Pool Money
International Free Agency -- Asia (Professional)
International Free Agency -- Cuba (Professional)
Isolated Power (ISO)
J
Japanese Posting System
K
K
Knuckleball (KN)
Knuckle-curve (KC)
Korean Posting System
L
Late-inning Pressure Situation (LIPS)
Launch Angle (LA)
Lead Distance (LEAD)
Left Fielder
Left On Base (LOB)
Leverage Index (LI)
Line-drive Rate (LD%)
Loss (L)
M
Magic Number (MN)
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Manager
Manager Challenge
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Max Height (HI)
Maximum Speed (SPD)
Mendoza Line
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N
Neighborhood Play
Non-guaranteed Contract
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Non-tendered
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Number of Pitches (NP)
O
Obstruction
Official Scorer
Oliver
On-base Percentage (OBP)
On-base Plus Slugging (OPS)
On-base Plus Slugging Plus (OPS+)
Ordinary Effort
Out (O)
Outfield Assist (OFA)
Outright Waivers
P
Pace of Play
Painting the Black
Passed Ball (PB)
Perceived Velocity (PV)
Pickle
Pickoff (PK)
Pitches Per Inning Pitched (P/IP)
Pitches Per Plate Appearance (P/PA)
Pitches Per Start (P/GS)
Pitching Coach
Plate Appearance (PA)
Plate Appearances Per Strikeout (PA/SO)
Player Empirical Comparison and Optimization Test Algorithm (PECOTA)
Player Option
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Pop Time (POP)
Pop-up Rate (PO%)
Postseason Eligibility
Projected Home Run Distance (HR-DIS)
Protested Game
Putout (PO)
Q
Qualifying Offer
Quality Start (QS)
R
Range Factor (RF)
Reached On Error (ROE)
Regulation Game
Release Waivers
Relief Pitcher
Relief Win (RW)
Replay Review
Right Fielder
Rookie Eligibility
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Rule 4 Draft
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Run (R)
Runs Allowed Per Nine Innings Pitched (RA9)
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S
Sacrifice Bunt (SH)
Sacrifice Fly (SF)
Salary Arbitration
Save (SV)
Save Opportunity (SVO)
Save Percentage (SV%)
Scorekeeping
Scouting grades
Screwball (SC)
Second Baseman
Seeing-eye Single
Service Time
Set Position
Shortstop
Shutout (SHO)
Single (1B)
Sinker (SI)
Skill-interactive Earned Run Average (SIERA)
Slider (SL)
Slide Rule
Slugging Percentage (SLG)
Southpaw
Spectator Interference
Spin Rate (SR)
Split Contract
Splitter (FS)
Sprint Speed (SS)
Starting Pitcher
Steamer
Stolen Base (SB)
Stolen-base Percentage (SB%)
Strikeout (SO, K)
Strikeout Rate (K%)
Strikeouts Per Nine Innings (K/9)
Strikeout-to-walk Ratio (K/BB)
Strike Zone
Substitutions
Super Two
Suspended Game
T
Texas Leaguer
The Hot Stove
Third-base Coach
Third Baseman
Tools of Ignorance
Total Bases (TB)
Total Chances (TC)
Trade Waivers & August 31 "Deadline"
Triple (3B)
Triple Play (TP)
True Earned Run Average (tERA)
Two-Seam Fastball (FT)
U
Ultimate Zone Rating (UZR)
Umpire
Unearned Run (UER)
V
Velocity (VELO)
Vesting Option
W
Walk (BB)
Walk-off
Walk-off (WO)
Walk Rate (BB%)
Walks And Hits Per Inning Pitched (WHIP)
Walks Per Nine Innings (BB/9)
Warmup Pitches
Weighted On-base Average (wOBA)
Weighted Runs Above Average (wRAA)
Weighted Runs Created Plus (wRC+)
Wild Pitch (WP)
Win (W)
Windup Position
Win Expectancy (WE)
Winning Percentage (WPCT)
Win Probability Added (WPA)
Wins Above Replacement (WAR)
X
Y
Z
Standard Stats
Defense
Assist (A)
Caught Stealing Percentage (CS%)
Double Play (DP)
Error (E)
Fielding Percentage (FPCT)
Innings Played (INN)
Out (O)
Outfield Assist (OFA)
Passed Ball (PB)
Putout (PO)
Total Chances (TC)
Triple Play (TP)
Offense
At-bat (AB)
Batting Average (AVG)
Caught Stealing (CS)
Double (2B)
Extra-base Hit (XBH)
Games Played (G)
Grand Slam (GSH)
Ground Into Double Play (GIDP)
Groundout-to-Flyout Ratio (GO/AO)
Hit-by-pitch (HBP)
Hit (H)
Home Run (HR)
Intentional Walk (IBB)
Left On Base (LOB)
On-base Percentage (OBP)
On-base Plus Slugging (OPS)
Plate Appearance (PA)
Reached On Error (ROE)
Run (R)
Runs Batted In (RBI)
Sacrifice Bunt (SH)
Sacrifice Fly (SF)
Single (1B)
Slugging Percentage (SLG)
Stolen Base (SB)
Stolen-base Percentage (SB%)
Total Bases (TB)
Triple (3B)
Walk (BB)
Walk-off (WO)
Pitching
Appearance (App)
Balk (BK)
Batters Faced (BF)
Blown Save (BS)
Complete Game (CG)
Earned Run (ER)
Earned Run Average (ERA)
Flyout (AO)
Games Finished (GF)
Games Started (GS)
Groundout (GO)
Hold (HLD)
Inherited Runner (IR)
Innings Pitched (IP)
Loss (L)
Number of Pitches (NP)
Pickoff (PK)
Quality Start (QS)
Relief Win (RW)
Save (SV)
Save Opportunity (SVO)
Save Percentage (SV%)
Shutout (SHO)
Strikeout (SO, K)
Unearned Run (UER)
Walks And Hits Per Inning Pitched (WHIP)
Wild Pitch (WP)
Win (W)
Winning Percentage (WPCT)
Advanced Stats
Defense
Defensive Efficiency Ratio (DER)
Defensive Runs Saved (DRS)
Range Factor (RF)
Ultimate Zone Rating (UZR)
Offense
On-base Plus Slugging Plus (OPS+)
Batting Average on Balls in Play (BABIP)
Isolated Power (ISO)
Late-inning Pressure Situation (LIPS)
Pitches Per Plate Appearance (P/PA)
Plate Appearances Per Strikeout (PA/SO)
Runs Created (RC)
Weighted Runs Above Average (wRAA)
Weighted On-base Average (wOBA)
Weighted Runs Created Plus (wRC+)
Win Probability Added (WPA)
Wins Above Replacement (WAR)
Pitching
Adjusted Earned Run Average (ERA+)
Baserunners Per Nine Innings Pitched (MB/9)
Bequeathed Runners (BQR)
Bequeathed Runners Scored (BQR-S)
Expected Fielding Independent Pitching (xFIP)
Fielding Independent Pitching (FIP)
Fly-ball Rate (FB%)
Game Score
Ground-ball Rate (GB%)
Hits Per Nine Innings (H/9)
Home Runs Per Nine Innings (HR/9)
Home Run To Fly Ball Rate (HR/FB)
Inherited Runs Allowed (IR-A)
Inherited Runs Allowed Percentage (IR-A%)
Innings Per Start (I/GS)
Leverage Index (LI)
Line-drive Rate (LD%)
Pitches Per Inning Pitched (P/IP)
Pitches Per Start (P/GS)
Pop-up Rate (PO%)
Run Support Per Nine Innings (RS/9)
Runs Allowed Per Nine Innings Pitched (RA9)
Skill-interactive Earned Run Average (SIERA)
Strikeout Rate (K%)
Strikeouts Per Nine Innings (K/9)
Strikeout-to-walk Ratio (K/BB)
True Earned Run Average (tERA)
Walks Per Nine Innings (BB/9)
Walk Rate (BB%)
Team
Ballpark Factor
Magic Number (MN)
Win Expectancy (WE)
Statcast
Defense
Arm Strength (ARM)
Catch Probability
Distance Covered (DCOV)
Exchange (XCH)
First Step (STEP)
Pop Time (POP)
Route Efficiency (RE)
Sprint Speed (SS)
Offense
Acceleration (ACC)
Barrel
Batted Ball Direction (BBD)
Batted Ball Event (BBE)
Exit Velocity (EV)
Expected Batting Average (xBA)
Expected Slugging Percentage (xSLG)
Expected Weighted On-base Average (xwOBA)
Generated Velocity (GV)
Hit Distance (DST)
Hit Probability
Home To First
Launch Angle (LA)
Lead Distance (LEAD)
Max Height (HI)
Maximum Speed (SPD)
Projected Home Run Distance (HR-DIS)
Pitching
Extension (EXT)
Perceived Velocity (PV)
Spin Rate (SR)
Velocity (VELO)
Transactions
Transactions
7-day DL
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10-day DL
25-man Roster
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60-day DL
Club Option
Competitive Balance Draft Picks
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Contract Tendered
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"File and Trial"
Free Agency
Guaranteed Contract
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International Free Agency -- Asia (Professional)
International Free Agency -- Cuba (Professional)
Japanese Posting System
Korean Posting System
Minor League Options
Mutual Option
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Non-tendered
Non-waiver Trade Deadline
No-trade Clause
Outright Waivers
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Player to Be Named Later (PTBNL)
Postseason Eligibility
Qualifying Offer
Release Waivers
Rule 4 Draft
Rule 5 Draft
Salary Arbitration
Service Time
Split Contract
Super Two
Trade Waivers & August 31 "Deadline"
Vesting Option
Pitch Types
Pitching
Changeup (CH)
Curveball (CU)
Cutter (FC)
Eephus (EP)
Forkball (FO)
Four-Seam Fastball (FA)
Knuckleball (KN)
Knuckle-curve (KC)
Screwball (SC)
Sinker (SI)
Slider (SL)
Splitter (FS)
Two-Seam Fastball (FT)
Projection Systems
Projections
Marcel the Monkey Forecasting System (Marcel)
Oliver
Player Empirical Comparison and Optimization Test Algorithm (PECOTA)
Steamer
sZymborski Projection System (ZiPS)
Positions
Positions
Baserunner
Batter
Bench Coach
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Catcher
Center Fielder
Closer
Designated Hitter
First-base Coach
First Baseman
General Manager
Hitting Coach
Left Fielder
Manager
Pitching Coach
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Right Fielder
Second Baseman
Shortstop
Starting Pitcher
Third-base Coach
Third Baseman
Rules
Rules
Ambidextrous Pitchers
Appeal Plays
Balk
Batter's Box
Batting Out of Turn
Catcher Interference
Coach Interference
Collisions at Home Plate
Dead Ball
Designated Hitter Rule
Doctoring the Baseball
Fair Ball
Field Dimensions
Fielder Right of Way
Force Play
Foul Ball
Foul Tip
Ground Rules
Infield Fly
Manager Challenge
Mound Visit
Neighborhood Play
Obstruction
Official Scorer
Ordinary Effort
Pace of Play
Protested Game
Regulation Game
Replay Review
Rookie Eligibility
Slide Rule
Spectator Interference
Set Position
Strike Zone
Substitutions
Suspended Game
Umpire
Warmup Pitches
Windup Position
Idioms
Idioms
Ace
Around-the-horn
Baltimore Chop
Bush League
Butcher Boy
Can of Corn
Cellar
Chin Music
K
Mendoza Line
Painting the Black
Pickle
Seeing-eye Single
Southpaw
Texas Leaguer
Tools of Ignorance
The Hot Stove
Walk-off
Miscellaneous
Miscellaneous
Major League Baseball logo
Scorekeeping
Scouting grades