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In baseball statistics, on-base plus slugging (denoted by OPS) is defined by the sum of on base percentage (OBP) and slugging percentage (SLG).
This statistic combines both the ability of a player to get on-base (OBP) and the player's power-hitting ability (SLG). It is very popular in measuring the offensive worth of a player since it:
- Is easy to calculate
- Has a strong positive correlation, at the team level, with runs per game.
The denominators for OBP and SLG are different, so to add the two to calculate OPS we put the fractions over a common denominator:
<math> OBP = \frac{Hits+Walks+Hits By Pitch}{At Bats+Walks+Sacrifice Flies+Hits By Pitch};SLG = \frac{Total Bases}{At Bats}<math>
<math> OPS = OBP + SLG = \frac{At Bats(Hits+Walks+Hits by Pitch)+Total Bases(At Bats+Walks+Sacrifice Flies+Hits By Pitch)}{At Bats(At Bats+Walks+Sacrifice Flies+Hits By Pitch)}<math>
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