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what does OPS+ technically measure

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  • what does OPS+ technically measure

    I have had it used to "prove" to me that player A is better than player B....yet in some cases I just cannot accept it.
    "Batting stats and pitching stats do not indicate the quality of play, merely which part of that struggle is dominant at the moment."

    -Bill James

  • #2
    Technically, it doesn't measure anything.

    Realistically, it tries to balance a player's hitting line (no baserunning) properly, such that it aligns itself with runs created.

    Once you graduate from the elementary school of OPS, you go to the high school of OPS+. When you want to go to college, look up Linear Weights and BaseRuns.

    I suggest you go here:

    http://www.tangotiger.net/wiki/
    Author of THE BOOK -- Playing The Percentages In Baseball

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    • #3
      In simplest terms it takes a player's (park-adjusted) On base and slugging and compares it to the league average, on a scale of 100.

      Here's the formula (BBRef):

      PRO+ = 100 * ( OBP/lgOBP + SLG/lgSLG - 1)/BPF

      Take Stan Musial 1948:

      I'm going to plug Musial's #s into the formula:

      100* [(.450/.351) + (.702/.408) -1]

      1.28 + 1.72 = 3

      3-1 = 2

      100*2 = 200.


      As you can see above, Musial was 72% better than the league at slugging and 28% better than the league at getting on base.
      THE REVOLUTION WILL NOT COME WITH A SCORECARD

      In the avy: AZ - Doe or Die

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