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    The Baseball Gauge Glossary

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    Teams

    GB (Games Behind)

    W1 = First place team's wins
    L1 = First place team's losses
    W = Team's Wins
    L = Team's Losses

    GB = ((W1 - L1) - (W - L)) / 2



    Luck

    The number of wins more (or less) than a team's pythagorean wins

    W = Wins
    pW = Pythagorean wins

    Luck = W - pW



    Pythagorean Record

    The PythagenPat method is used to calculate pythagorean record.

    RS = Runs scored
    RA = Runs allowed
    IP = Innings pitched
    G = Games
    exponent = ((RS + RA) * 9 / IP)^.285

    Pyth (Pythagorean Winning Percentage) = (RS^exponent / (RS^exponent + RA^exponent)
    Pythagorean Wins = Pyth * G



    Base Runs Record

    While there are a number of different ways to calculate Base Runs, The Baseball Gauge uses TangoTiger's formula.

    A factor = H + BB + HBP - .5 * IBB
    B factor = 1.1 * (1.4 * (1B + 2B * 2 + 3B * 3 + HR *4) - .6 * H - 3 * HR + .1 * (BB - IBB + HBP) + .9 * (SB - CS - GIDP))
    C factor = AB - H + CS + GIDP
    D factor = HR
    The B factor is adjusted to fit the league wide run scoring environment

    Base Runs = ((A * B) / (B + C)) + D

    IP = Innings pitched
    G = Games
    Off = Offensive Base Runs
    Def = Defensive Base Runs
    exponent = ((Off + Def) * 9 / IP)^.285
    Base Runs Winning Percentage = (Off^exponent / (Off^exponent + Def^exponent)
    Base Runs Wins = Base Runs Winning Percentage * G



    Run Differential

    RS = Runs scored
    RA = Runs allowed

    Run Diff = RS - RA



    Def +/- (Runs Allowed Below Average)

    # of runs per 9 innings a team has allowed fewer than the average team
    RA = Runs allowed
    Adj = Team's ballpark run adjustment
    IP = Team's innings pitched
    LgRA/IP = League's Run allowed per innings pitched

    RA +/- = (LgR/IP * Adj) * IP - RA



    Off +/- (Runs Scored Above Average)

    # of runs per 9 innings a team has scored more than the average team
    RS = Runs scored
    Adj = Team's ballpark run adjustment
    Inn = Team's offensive innings (estimated as innings pitched minus home wins plus away losses
    LgR/Inn = League's Run scored per inning

    RS +/- = RS - (LgR/Inn * Adj) * Inn



    Platoon Advantage

    A platoon advantage from the batters perspective is when a righthanded batter faces a lefthanded pitcher or vice versa. From the pitcher's perspective, a platoon advantage is when they are facing a batter with the same handedness

    aPA = Plate appearances with platoon advantage
    PA = Total plate appearances

    Platoon Advantage = aPA / PA