OPS – On-base Plus Slugging

On base percentage can be useful in many ways but in OPS (On-base Plus Slugging) you incorporate slugging in one stat. The idea to give you even more information about the hitter’s performance.

Implications for fantasy baseball

  • Sample size large enough?
  • In your league do you use OBP or AVG?
  • High OPS are the true superstars in the game
  • OPS almost twice as important than SLG in run scoring
  • OPS .710 average, OPS .800 above average

The formula


OBP = (H + BB + HBP) / (AB + BB + HBP + SF)

SLG = (1B + 2 x 2B + 3 x 3B + 4 x HR) / AB

OPS – On-base Plus Slugging

OBS – On-base percentage

SLG – Slugging

OBP – On-base percentage

H – Hits

BB – Walks

HBP – Hit by pitch

AB – At bats

BB – Walks

HBP – Hit by pitch

SF – Sacrifice flies

1B – single

2B – double

3B – triple

HR – home run

Basic facts about OPS

OPS is now widely used and it has an advantage over several commonly used stats like RBI, Runs and Home runs, because it will show you a hitter’s ability to get on base and measure extra base hits. One problem with OPS is however it tends to overrate power hitters, and players who gets a lot of walks tend to be underrated. As long as you know the limitations of a certain stat you can also make a better judgement.

OPS is of course dependent of the sample size. High numbers early in the season, with few Plate Appearances can easily change quickly. In today’s MLB home run numbers have exploded, so if you compare OPS to other eras, please remember the current and past tendencies.

What can you expect?

If you are not familiar with OPS it will be hard to judge what is okay, great and poor. An OPS over 1.000 is considered excellent, 0.710 average, and 0.600 poor. In 2018 only four players (!) reached and OPS 1.000 or over, so a stat line over .900 is still absolutely top of the MLB.

OPS Leaders 2018

  1. Mike Trout 1.088
  2. Mookie Betts 1.078
  3. D. Martinez 1.031
  4. Christian Yelich 1.000
  5. Jose Ramirez .939
  6. Nolan Arenado .935
  7. Alex Bregman .926
  8. Paul Goldschmidt .922
  9. Trevor Story .914
  10. Anthony Rendon .909