OPS+ (Adjusted OPS)

OPS adjusted for ballpark and era, where 100 equals the league average — the standard for cross-era hitter comparison.

OPS+ takes a player's On-Base Plus Slugging and adjusts it for the run environment of their league and the effects of their home ballpark. The result is normalized so that 100 equals exactly the league average.

An OPS+ of 150 means a player was 50% better than the average hitter after accounting for context. An OPS+ of 170+ is rare and elite. Career OPS+ above 140 has been a near-automatic Hall of Fame indicator for players with sufficient plate appearances.

OPS+ is provided by Baseball Reference and is one of the most cited advanced stats in Hall of Fame debates, alongside WAR. It allows fair comparison between players who played in different eras and ballparks — Babe Ruth in 1927 vs. Barry Bonds in 2001 vs. Shohei Ohtani in 2024.