**2B**

Doubles

**3B**

Triples

**AB**

At Bats

**Aff**

Affiliate

**Age**

Age. Age on July 1st of a given year.

**BA**

Batting Average. Calculated by H/AB

**BABIP**

Batting Average on Balls In Play. The percentage of hits on balls in play. Calculated by (H-HR)/(AB-K-HR-SF)

**BABIP-IFB**

It’s mostly true that pitchers have little control over their balls in play, so if a pitcher is too far from the league average BABIP his performance is likely going to regress to the mean. However, one reliable way a pitcher has to control his BABIP is by inducing popups. Since popups have the same result as a strikeout 99% of the time (batter is out, runners can’t advance) BABIP-IFB treats popups the same as a strikeout, and removes them from the denominator of BABIP.

**Ball**

* Balls*

**BB**

Walks

**BB%**

Percentage of plate appearances ending in a walk

**BB/9**

Walks Per Nine Innings

**BF**

Batters Faced

**BIP**

Balls In Play

**Bunt**

Number of balls bunted into play.

**Bunt%**

Percentage of balls bunted into play.

**CI**

Catchers Interference

**Con%**

Contact Percentage. Percentage of swings a batter makes contact on.

**DP**

Double Plays

**ER**

Earned Runs.

**ERA**

Earned Run Average. Calculated by ER/IP*9

**FIP**

Fielding Independent Pitching. A stat that measures everything a pitcher can control, then adjusts that on a scale similar to ERA. Intended to measure how well a pitcher pitched, regardless of the defense behind him. Calculated by ((HR*13+(BB+HBP-IBB)*3-K*2)/IP)+3.2

**Foul**

Foul Balls

**G**

Games Played

**GScr**

Game Score. Developed by Bill James to determine the strength of a starting pitcher during a game. Calculated by starting at 50 points, adding a point for every out recorded, two points for every inning finished passed the fourth, and one point for every strike out. You then subtract two points for every hit allowed, four points for each earned run, two points for each unearned run, and one point for each walk

**GB**

Ground Balls.

**GB%**

Ground Ball Percentage. The percentage of balls in play that are ground balls

**GB/FB**

Ground Ball To Fly Ball Ratio. Infield and outfield flies are included in fly balls

**HR**

Home Runs

**H**

Hits

**H/9**

Hits Per Nine Innings

**HBP**

Hit By Pitch

**HR**

Home Runs

**HR/9**

Home Runs Per Nine Innings

**HR/Con**

Percentage of balls a batter puts into play that become home runs. Does not include bunts.

**HR/OFB**

The percentage of outfield fly balls that become home runs

**IBB**

Intentional Walks

**IFB**

Infield Fly Balls.

**IFB%**

Infield Fly Ball Percentage. The percentage of balls in play that are fly balls to the infield

**Iso**

Isolated Power. Slugging Percentage – Batting Average

**AB/K**

Strike out to at bat ratio.

**K/BB**

Strike out to walk ratio.

**K%**

Percentage of plate apperances ending in a strike out

**K?**

Unknown Strikeout Type

**K/9**

Strike Outs Per Nine Innings

**KLook**

Strike Outs Looking

**KS/KL**

Strike Outs Swinging to Strike Outs Looking Ratio

**KSwing**

Strike Outs Swinging

**LD**

Line Drives Hit.

**LD%**

Line Drive Percentage. The percentage of balls in play that are line drives

**Lev**

Level

**Lg**

League

**NP**

Number of Pitches

**OCon%**

Percentage of time a player makes contact when he swings at a ball outside the strike zone.

**OBP**

On Base Percentage. Calculated by (H+BB+HBP)/(AB+BB+HBP+SF)

**OFB**

Outfield Fly Balls.

**OFB%**

Outfield Fly Ball Percentage. The percentage of balls in play that are fly balls to the outfield

**OPS**

On Base Pecentage Plus Slugging Percentage

**OSwng%**

Percentage of balls swung at outside the strike zone

**P/PA**

Pitches Per Plate Apperance

**PA**

Plate Appearances

**Pythagorean Record**

A method to calculate a teams expected record based on the number of runs they scored and allowed. Calculated by (Runs^1.81/(Runs^1.81+Runs Against^1.81) * Games to get pythagorean wins

**R**

Runs

**ROE**

Reached On Error

**RBI**

Runs Batted In

**SF**

Sacrifice Flies

**SH**

Sacrifice Hits

**SLG**

Slugging Percentage. Calculated by TB/AB

**SLook**

Called Strikes

**SIERA**

Skill-Interactive Earned Run Average. Developed by Baseball Prospectus SIERA accounts for how run prevention improves as ground ball rate increases and declines as more whiffs are accrued, while grounders are of more materiality for those who allow a surplus of runners. The formula for SIERA is: SIERA = 6.145 Ð 16.986*(SO/PA) + 11.434*(BB/PA) Ð 1.858*((GB-FB-PU)/PA) + 7.653*((SO/PA)^2) +/Ð 6.664*(((GB-FB-PU)/PA)^2) + 10.130*(SO/PA)*((GB-FB-PU)/PA) Ð 5.195*(BB/PA)*((GB-FB-PU)/PA) where the +/- term is a negative sign when (GB-FB-PU)/PA is positive and vice versa.

**SMiss**

Swings And Misses

**K**

Strike Outs

**SSwng**

Swinging Strikes

**Str**

Strikes

**Sv**

Saves

**Swng%**

Swing Percentage. Percentage of pitches swung at.

**SwStr%**

Swinging Strike Percentage. Percentage of strikes swung at.

**TB**

Total Bases

**TTO%**

Three true outcomes percentage. The percentage of time a plate appearance results in a strike out, walk, or home run.

**U**

Unknown Batted Ball. Plays where batted ball data is not available

**U%**

Unknown Batted Ball Percentage. The percentage of balls in play with an unknown batted ball type.

**UIBB%**

Percentage of plate apperances ending in an unintentional walk

**W**

Wins

**W-L%**

Win-Loss percentage

**WHIP**

Walks and Hits per Inning Pitched.

**wOBA**

Weighted on base percentage. A statistic based on linear weights designed to better capture what is important on offense. More on how we calculate wOBA here.

**ZCon%**

Percentage of time a player makes contact when he swings at a ball inside the strike zone.

**Zone%**

Percentage of balls thrown in the strike zone

**ZSwng**

Percentage of balls swung at inside the strike zone