Stats Glossary

Most of the stats discussed on this blog are either from Baseball-Reference.com or Fangraphs.com.

Here are a few of the stats quite commonly mentioned:

  • WAR stands for Wins Above Replacement and is a measure of how many wins a player was worth as compared to a replacement-level player. The exact method of determining WAR is complex, and it differs between B-R.com and Fangraphs. Commonly on this site, then, you may see the designations bWAR and fWAR if the numbers are drawn from one of those two particular web sites.
  • OPS is on-base percentage plus slugging percentage. OPS+ is a normalized version of OPS that takes into account both the league-wide average OPS as well as the player’s home ballpark. A value of 100 is considered league-average, while over 100 is better than average.
  • ERA+ is similar to OPS+ in that it has been normalized to the league-wide average ERA and the player’s ballpark. 100 is average, while over 100 is better than average.
Game Score (explanation taken from B-R page here):
  • This is a value created by Bill James that evaluates how good a pitcher’s start was.

    Start with 50 points. Add 1 point for each out recorded, (or 3 points per inning). Add 2 points for each inning completed after the 4th. Add 1 point for each strikeout. Subtract 2 points for each hit allowed. Subtract 4 points for each earned run allowed. Subtract 2 points for each unearned run allowed. Subtract 1 point for each walk.

Please add any requests in the comments below for more terms to be explained here.

14 thoughts on “Stats Glossary

  1. 1
    RJ says:

    You’ve got a typo on “Fangraphs” in the first bullet point. Love the new website Andy!

  2. 2
    Kahuna Tuna says:

    Consider separating the entries with a hard return. Easier on the eyes. If you don’t want all that empty space, you could put a bullet at the beginning of each entry.

    Whatever you do, this glossary is a terrific idea!

  3. 3
    Andy says:

    Bullets are broken for some reason…trying to get them fixed. We had this problem on B-R too.

  4. 6
    Toffer says:

    Why is HHS using the bWAR name rather than the more common rWAR name that gives proper credit to the creator rather than the distributor? I don’t remember even B-R referring to it as bWAR.

    • 7
      Andy says:

      I’m not even aware of the history of that stat–can you provide a link? If I’m drawing numbers from B-R’s site, it seems appropriate to flag them with the ‘b’ to make it clear what the source is.

  5. 9
  6. 10
    Test Comment says:

    this is a test

  7. 12
  8. 13
    loy says:

    Great information shared

  9. 14
    google.com says:

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