Opponent OPS OOPS

OOPS stands for opponent ops in baseball. The on-base plus slugging that opposing hitters managed against this pitcher — what he turned the league into.

How OOPS is calculated

OOPS = opponent OBP + opponent SLG

It reads like a hitter’s line, which is the point: an OOPS of .600 means every batter he faced hit like a backup catcher.

What counts as a good OOPS?

Half of the 327 qualified MLB players in 2026 were at or below .701. The best tenth were under .573.

Median: .701
Top 10% (low): .573
Leader: .441

By position, the median was .680 for RP and .720 for SP.

Qualified: 50+ IP, non-zero, 2026 regular season.