What is OPS in baseball?
On-base plus slugging: one number that adds how often a hitter reaches base to how many bases his hits are worth. It became the standard shorthand because it catches both the walk and the home run.
The number, then the game
OPS calculator.
On-base plus slugging in one number, sized against the best seasons ever hit — then draft an all-time nine below.
A .360 on-base percentage plus .480 slugging = .840 OPS.
OPS = on-base percentage + slugging percentage
Famous single-season OPS marks
- 1.422Barry Bonds · 2004
- 1.382Babe Ruth · 1920
- 1.287Ted Williams · 1941
- 1.159Aaron Judge · 2024
On-base plus slugging in one number, sized against the best seasons ever hit — then draft an all-time nine below.
Numbers this good belong on a roster. Draft an all-time nine and run the season.
ROUND 01
SPIN THE ERA
Board setupoptional
ModeStats on every card.
Roster12 picks · seats read the era they come from
Player yearspeak years only
Position changestap a seat to slide or swap
Teams
Erasevery era on the board
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Same board for everyone. Resume until you finish. Streak on the line.
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From the record book
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Newly completed teams, ranked and listed pick by pick.
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The record booklegendary baseball teams — tap one to draft its eras
The rules
01SPIN
Every spin lands a franchise era — anywhere greatness happened. One legend era guaranteed per run.
02DRAFT
12 seats, your order — tap any open seat to spin it. Every pick flips the card: the honors, the rings, the real numbers.
03SURVIVE
A hundred sixty-two regular-season games, wire to wire — every lineup and rotation seat counts. Go 162-0 and you’re immortal.
10,666player-seasons
1871–todaya century and a half
162games to survive
Guess the Player questions
What is a good OPS?
League average sits near .700–.720. An .800 season is clearly good, .900 is All-Star country, and 1.000 across a full year usually means MVP votes.
What is the best OPS season ever?
Barry Bonds posted a 1.422 OPS in 2004 — he reached base more often than he made outs that year. Babe Ruth’s 1.382 in 1920 held the record for the previous eight decades.
Do I need my OBP and SLG first?
Enter them if you know them. OBP is (hits + walks + hit-by-pitch) over plate appearances; slugging is total bases over at-bats — our slugging calculator works it from your hit line.
Why do analysts move past OPS?
It weighs on-base and slugging equally, though reaching base is worth more. Stats like wOBA fix the weights — but OPS survives because you can do it in your head at the park.