What Does OPS Mean in Baseball?

OPS in baseball means on-base plus slugging. You take a hitter’s on-base percentage (OBP) and add it to their slugging percentage (SLG), and the sum is their OPS. One number, two skills: how often the batter reaches base, and how much power they hit for.

That combination is why OPS caught on. Batting average alone treats a walk as nothing and a single the same as a home run. OPS fixes both blind spots at once, which is why broadcasts and front offices lean on it. Below is what a good OPS looks like, a worked example, and how OPS+ takes the idea a step further.

The formula, with a real example

The math is addition. If a hitter has a .380 on-base percentage and a .520 slugging percentage, their OPS is .900.

• OBP = how often the batter reaches base per plate appearance (hits, walks and hit-by-pitches all count).
• SLG = total bases per at-bat, so a home run is worth four times a single.
• OPS = OBP + SLG.

Because the two pieces measure different things, a hitter can reach a strong OPS by different routes. A patient leadoff man might post a .400 OBP with a modest .420 slug. A slugger might carry a .330 OBP but a .580 slug. Both land near .800, and both help the offense in their own way.

What is a good OPS in baseball?

League-average OPS usually sits somewhere between .700 and .720. From there the tiers are well established among analysts, and this scale is the quick reference most fans use.

OPS	Rating
1.000 and up	Historic, MVP-level
.900 to .999	Excellent, league leaders
.834 to .899	Very good, All-Star caliber
.767 to .833	Above average
.700 to .766	Roughly league average
Below .700	Below average

So when a hitter is described as having an .800 OPS, that is genuinely solid, an above-average regular. Cross .900 and you are talking about one of the better bats in the league that season. The gap from .800 to .900 is far larger in value than the raw hundred points suggests.

For the ultimate expression of the power half of this stat, see the most home runs in a season, where the record holders posted some of the highest slugging figures ever recorded.

How to read OPS at a glance

Once you know the tiers, OPS becomes a fast filter for a hitter’s whole season. You do not need to calculate it during a game; it is listed on nearly every scoreboard and stat page. But knowing where it comes from helps you trust it.

Say a hitter reaches base 38 times per 100 plate appearances (a .380 OBP) and averages .520 total bases per at-bat. Add them and you get .900, an excellent line. If a teammate has the same .380 OBP but only a .410 slug, their .790 OPS tells you instantly they get on base just as often but do far less damage when they hit. That contrast is exactly what a single number like batting average would hide, and it is why analysts reach for OPS first when scanning a roster.

The elite end puts the scale in perspective. A season OPS above 1.000 is rare enough that it usually leads the league, and the all-time single-season high, Barry Bonds’ 1.4217 in 2004, sits so far above the tiers above that it reads almost like a different sport.

What is OPS+ (OPS plus)?

OPS+ takes plain OPS and adjusts it for two things raw OPS ignores: the ballpark and the league’s run environment. It is scaled so that 100 is exactly league average. A 150 OPS+ means the hitter was 50 percent better than league average, and an 80 means 20 percent below.

That adjustment matters more than it sounds. A .900 OPS in a pitcher-friendly park during a low-scoring season is a bigger achievement than a .900 OPS in a hitter’s park during a slugfest year. OPS+ levels that out, which makes it the better tool for comparing players across eras and stadiums. If you want to argue whether a 1970s hitter was better than a modern one, OPS+ is the honest way to do it, while raw OPS is the quick in-game shorthand.

Where OPS falls short

OPS is not perfect, and it helps to know the catch. It simply adds OBP and SLG as if they were equal, when getting on base is actually a bit more valuable to scoring than slugging is. Stats like wOBA weight each outcome more precisely, which is why deeper analysts prefer them.

For everyday use, though, OPS is the best return on effort in baseball stats: one figure, easy to calculate, and far more telling than batting average. To see how a different single-number stat works on the pitching side, read our explainer on what ERA means in baseball, and for the game’s biggest bats, see the highest-paid MLB players, where OPS production is exactly what those contracts are buying.

The short version: OPS is OBP plus SLG, .800 is good and .900 is excellent, and OPS+ is the same idea corrected for park and league with 100 as the midpoint.