What Is WAR in Baseball and How Does It Work?

The players with the most WAR in a season are invariably among the favourites for MVP in MLB odds. WAR aims to cover all of a player’s skills to show the value they provide to their team. 

The team with the most WAR isn’t guaranteed to have the shortest World Series price in baseball odds, but the statistic has become a core metric when evaluating a player’s performance across a season or their entire career. 

What Is WAR in Baseball, and How Does It Work?

WAR is a metric to determine how much better a player is than the replacement level at their position. This covers all facets of the game.

In theory, WAR shows how many more wins a player is worth than a replacement-level alternative, such as an easily signable minor league free agent. 

There are different formulas to calculate WAR. Baseball Reference (bWAR) and FanGraphs (fWAR) are the two most commonly used types of WAR. The main difference between the two is that FanGraphs uses UZR for fielding and FIP for pitching, while Baseball Reference uses DRS for fielding and runs allowed for pitching. 

When Does WAR Stand For?

WAR stands for “wins above replacement.”

It is a single number to illustrate a player’s overall value to their team. 

What Is a Good WAR in Baseball?

A full-time position player should be worth around two WAR. An All-Star is generally in the four to five WAR region, according to FanGraphs. MVPs often produced six or more WAR throughout the course of a season.

Babe Ruth’s 14.1 bWAR in 1923 is the highest single-season mark in MLB history. Aaron Judge’s 10.8 bWAR in 2024 is the highest WAR in a single season by any active player, while Mike Trout has the highest career WAR among all active players.