Here are some common (and not so common) statistics used on this site when referring to pitchers:
| PITCHING STATISTICS | |
| #P/IP | Pitches thrown per inning |
| #P/GS | Pitches thrown per start |
| #Pit | Pitches thrown |
| 2B | Doubles allowed |
| 3B | Triples allowed |
| AGS | Average Game Score. See Game Score, below |
| Avg | Batting average allowed |
| BB | Bases on balls |
| BIPA | Balls In Play Average. Batting Average Against, not including home runs or strikeouts. |
| Bk | Balks |
| BlSv | Blown saves. See SvOp, below, for definition of a save situation |
| CG | Complete games |
| CS | Runners caught stealing |
| CW | Cheap Wins. Wins in games started that are not Quality Starts. |
| Dec | Decision (Win, loss) |
| DIPS ERA | A pitcher’s ERA, independent of the defense behind him. This formula, based on essays by Voros McCracken, assumes that all pitchers have consistent BIPA (See Above), and adjusts accordingly. The DIPS ratios on ESPN use the DIPS 2.0 formula, are not park-adjusted, and do not adjust for knuckleball pitchers. |
| ER | Earned runs |
| ERA | Earned-run average (ER times 9) divided by IP |
| ERC | Component ERA. A pitcher’s ERA based on the hits and walks he allowed, rather than actual runs. |
| ERC% | Ratio of Component ERA to actual ERA |
| FB | Fly balls hit against |
| G/F | Ground ball/fly ball ratio against GB divided by FB |
| GB | Ground balls hit against |
| GIDP | Grounded into double plays against |
| GF | Games finished |
| GS | Games started |
| GSc | Game Score. Start with 50 points. Add 1 point for each out recorded, (3 points per inning). Add 2 points for each inning completed after the 4th. Add 1 point for each strikeout. Subtract 2 points for each hit allowed. Subtract 4 points for each earned run allowed. Subtract 2 points for each unearned run allowed. Subtract 1 point for each walk. |
| H | Hits against |
| Hld | Holds. Earned when a relief pitcher enters a game in a save situation (see SvOp, below, for definition), records at least one out, and leaves the game without having given up the lead |
| HR | Home runs allowed |
| IBB | Intentional bases on balls |
| IP | Innings pitched |
| IR | Inherited runners. Runners on base when a relief pitcher enters a game |
| L | Losses |
| OBP | On-base percentage allowed. See OBP in Batting Statistics, above, for definition of OBP |
| ORuns | Opponents’ runs scored (average, per nine innings pitched) while the pitcher of record. |
| PFR | Power/Finesse Ratio Strikeouts Plus Walks Divided By Innings Pitched |
| Qualified year-to-date | In order to qualify for pitching titles in averaged categories (ERA, WPct, #P/IP, RS, ORuns, Slg, OBP, Avg, CS%, G/F), a player must average at least one inning pitched for every game his team has played. Sorting by qualified year-to-date excludes all players not currently on pace to reach that minimum |
| QS | Quality starts |
| R | Runs |
| RBI | Runs batted in allowed |
| Rel | Relief decision (Save, blown save, hold) |
| RS | Run support. Team’s runs scored (average, per 9 innings pitched) while the pitcher of record |
| SB | Stolen bases allowed |
| SF | Sacrifice flies allowed |
| SH | Sacrifice hits allowed |
| ShO | Shutouts |
| Slg | Slugging percentage allowed. See Slg in Batting Statistics, above, for definition |
| SO | Strikeouts |
| Sv | Saves. Earned when a pitcher finishes a game without having given up the lead after entering in a save situation (see SvOp, below, for definition) |
| SvOp | Save opportunities. When a pitcher 1) enters the game with a lead of three or fewer runs and pitches at least one inning, 2) enters the game with the potential tying run on base, at bat, or on deck, or 3) pitches three or more innings with a lead and is credited with a save by the official scorer |
| TBF | Total batters faced |
| TL | Tough Losses. Losses in games started that are Quality Starts. |
| WHIP | Walks plus hits divided by Innings Pitched |
| W | Wins |
| WPct | Winning percentage Wins divided by (Wins + losses) |
| WP | Wild pitches |
*courtesy of ESPN
