On Base Plus Slugging (OBPS) is a baseball metric used to combine a batter’s number of hits with their slugging percentage.
It is intended to give a balanced perspective between the two statistics. On-base percentage does not take account the quality of each hit (how many bases it earned), while slugging percentage focuses on the quality of each hit, but does not show the odds of a hit happening (which puts a player on base and avoids an out).
Critics of OBPS note that the while OBP and SLG are given equal weight in the metric, OBP is generally considered to be a more important part of the equation (as much as 4 times more important) when weighting is considered (the Gross Production Average metric was built with the intention of better dealing with this metric). As well, the OBPS metric often produces a number that is difficult to understand to the general sports fan who is often used to seeing Batting Average statistics.
If a batter has an on-base percentage of 0.295 and a slugging average of 0.386, then:
OBPS = 0.295 + 0.386
OBPS = 0.681
Therefore, the batter’s OBPS is 0.681.
What is On Base Percentage?
On-base percentage measures the number of times a batter gets on base in relation to their number of at-bats.
What is slugging percentage?
Slugging percentage measures the total number of bases earned in relation to the player’s number of at-bats.
- Wikipedia – On-base plus slugging
- Wikipedia – On-base percentage
- Wikipedia – Slugging percentage
- Major League Baseball – Official Rules: 10.01 – The Rules of Scoring
- ESPN – MLB Statistics – Batting
- NCAA – Official Baseball Statistics Rules
- NCAA – Official Softball Statistics Rules
- NCAA – The Official NCAA Baseball and Softball Scorebook
- NFHS – Statistician’s Manual
- International Baseball Federation – Scoring Manual
Baseball Statistics Calculators
- At Bats per Home Run (ABHR)
- Batting Average (BA)
- Batting Average on Balls in Play (BABIP)
- Walks per 9 Innings (BB/9)
- Walk to Strikeout Ratio (BB/K)
- Batting Park Factor (BFP)
- Component ERA (CERA)
- Defense Independent Component ERA (DICE)
- Earned Run Average (ERA)
- Equivalent Average (EqA)
- Fielding Percentage (FCPT)
- Fielding Percentage (FIP)
- Ground Ball / Fly Ball (GB/FB)
- Ground Outs / Fly Outs (GO/AO)
- Gross Production Average (GPA)
- Hits per 9 Innings (H/9)
- Innings Pitched per Game (IP/GS)
- Isolated Power (ISO)
- Strike to Walk Ratio (K/BB)
- Left on Base Percentage (LOB%)
- On Base Percentage (OBP)
- On Base Plus Slugging (OBPS)
- Opponents Batting Average (OBA)
- Plate Appearances per Strikeout (PA/SO)
- Power Finesse Ratio (PFR)
- Pythagorean Expectation
- Run Average (RA)
- Runs Created (RC)
- Range Factor (RF)
- Runs Produced (RP)
- Stolen Base Percentage (SB%)
- Slugging Percentage (SLG)
- Save Percentage (SV%)
- Total Average (TA)
- Total Bases (TB)
- Total Chances (TC)
- Times on Base (TOB)
- Walks and Hits per Inning Pitched (WHIP)
- Extrapolated runs (XR / XRR / XRB)