What do the baseball stats in Long Season mean?
Long Season computes a full set of standard baseball statistics for batters and pitchers, from AVG and OPS to wRC+, FIP and a simplified WAR. This glossary defines each one as the game calculates it.
Batter statistics
| Stat | Meaning |
|---|---|
| AVG | Batting average: hits divided by at bats. |
| OBP | On base percentage: times on base per plate appearance. |
| SLG | Slugging percentage: total bases per at bat. |
| OPS | On base plus slugging: OBP added to SLG. |
| BABIP | Batting average on balls in play: hits on balls that stayed in the field, divided by at bats that ended that way. |
| ISO | Isolated power: slugging percentage minus batting average. |
| wOBA | Weighted on base average: each way of reaching base is weighted by its run value. |
| wRC+ | Weighted runs created, league adjusted, scaled so 100 is league average. |
| OPS+ | On base plus slugging, league adjusted, scaled so 100 is league average. |
| WAR | Wins above replacement, a simplified version for batters and pitchers that sums a player value in wins. |
Pitcher statistics
| Stat | Meaning |
|---|---|
| ERA | Earned run average: earned runs allowed per 9 innings. |
| WHIP | Walks plus hits per inning pitched. |
| Saves | Credited to a reliever who finishes a win for the team under save conditions. |
| ERA+ | Adjusted earned run average, scaled so 100 is league average. |
| FIP | Fielding independent pitching: built from strikeouts, walks, and home runs allowed. |
| K/9 | Strikeouts per 9 innings. |
| BB/9 | Walks per 9 innings. |
| HR/9 | Home runs allowed per 9 innings. |
| K/BB | Strikeouts divided by walks. |
Live game statistics
| Stat | Meaning |
|---|---|
| Win probability | The chance a team wins the current game, updated play by play as the game unfolds. |
Where to see them
Every simulated game produces a full box score, and the league pages add league leaders, records and team analytics. The stats above are the ones Long Season computes and shows for every game you play.
Reading them at a glance
The plus stats (wRC+, OPS+, ERA+) are scaled so 100 is league average, so a 120 means twenty percent above league average. The rate stats that divide by 9 innings (K/9, BB/9, HR/9) exist so starters and relievers with different workloads can be compared on the same scale.
Win probability is the live one: it moves with every play of a game and answers what a single at bat just did to the chance of winning. WAR sums it up for a season line, for batters and pitchers alike, as a simplified version in this game.
Why the numbers look modern
The league is calibrated to modern offensive levels: batting average around .250, home runs on about 2.8 percent of plate appearances, and strikeouts on about 23 percent. Historical replays start from the recorded stats of their era, but the simulation itself produces modern looking lines in any season.