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Game Score

HITTERS:

BA (Batting Average)

Number of hits divided by at bats.

Excellent .340
Great .325
Above Average .300
Average .275
Below Average .250
Poor .225
Awful .200

OBP (On Base Percentage)

Measures how often a batter reaches base for any reason other than a fielding error, fielder’s choice, catcher interference, dropped/uncaught third strike or fielder’s obstruction.

Excellent .390
Great .370
Above Average .340
Average .320
Below Average .310
Poor .300
Awful .290

wOBA (Weighted On-Base Average)

Combines different aspects of hitting, weighing each in proportion to their actual run value; the weights change on a yearly basis.

Excellent .400
Great .370
Above Average .340
Average .320
Below Average .310
Poor .300
Awful .290

SLG (Slugging Percentage)

Combines different aspects of hitting, weighing each in proportion to their actual run value; the weights change on a yearly basis.

Excellent .600
Great .550
Above Average .450
Average .400
Below Average .360
Poor .300
Awful .260

OPS (On-Base plus Slugging Percentage)

Add OBP and Slugging percentages.

Excellent 1.000
Great .900
Above Average .800
Average .710
Below Average .670
Poor .600
Awful .570

ISO (Isolated Power)

ISO is a measure of hitter’s raw power and frequency of extra base hits.

Excellent .250
Great .200
Above Average .170
Average .140
Below Average .120
Poor .100
Awful .080

WAR (Wins Above Replacment) for Position Players and Pitchers

Stat measures a player’s total value/contributions to the team (if the player gets injured, and was replaced by a minor league or low level bench player, how much value would the team be losing?)

Scrub 0.1
Role Player 1-2
Solid Starter 2-3
Good Player 3-4
All-Star 4-5
Superstar 5-6
MVP 6+

ISO (Isolated Power)

wRC is an estimate of the number of runs created by a player; wRC+ makes adjustments for ballpark and factors in the league average.

wRC wRC+ Rating
105 .160 Excellent
90 140 Great
75 115 Above Average
65 100 Average
60 80 Below Average
50 75 Poor
40 60 Awful

wOBA (Weighted On Base Average)

wOBA captures the value of all of a hitter’s contributions, using a “linear weights” approach assigning coefficients to every contribution dividing by plate appearances.

Excellent .400
Great .370
Above Average .340
Average .320
Below Average .310
Poor .300
Awful .290

wRAA (Weighted Runs Above Average)

Measures the number of offensive runs a player contributes to their team compared to the average player; zero is league average.

Excellent 40
Great 20
Above Average 10
Average 0
Below Average -5
Poor -10
Awful -20

PITCHERS

ERA (Earned Run Average - Starting Pitcher)

The mean of earned runs (those not enabled by an error or passed ball) given up per nine innings pitched .

Excellent 2.50
Great 3.00
Above Average 3.40
Average 3.75
Below Average 4.00
Poor 4.30
Awful 4.60

FIP (Field Independent Pitching)

FIP is an estimate of a pitcher’s run prevention independent of their defense performance.

Excellent 2.90
Great 3.20
Above Average 3.50
Average 3.80
Below Average 4.10
Poor 4.40
Awful 4.70

ERA-/FIP-/xFIP- Earned Run Average Minus, Field Independent Pitching Minus, and Expected Field Independent Pitching):

These are park and league-adjust versions of ERA, FIP and xFIP; it is a “simple way” to tell how well a player performed in relation to league average (league average is set to 100).

Excellent 70
Great 80
Above Average 90
Average 100
Below Average 110
Poor 115
Awful 125

WHIP (Walks and Hits Per Innings Pitched)

This measures how many base runners a pitcher allows..

Excellent 1.00
Great 1.10
Above Average 1.25
Average 1.32
Below Average 1.40
Poor 1.50
Awful 1.60

K/9 and K% (Strikeouts Per 9 Innings and Strikeout Percentage)

Excellent 10.0 27%
Great 9.0 24%
Above Average 8.2 22%
Average 7.7 20%
Below Average 7.0 17%
Poor 6.0 15%
Awful 5.00 13%

BB/9 and BB% (Walks per 9 Innings and Walk Percentage)

BB/9 BB%
Excellent 1.5 4.5%
Great 1.9 5.5%
Above Average 2.5 22%
Average 2.9 7.7%
Below Average 3.2 8.0%
Poor 3.5 8.5%
Awful 4.0 9.0%

SIERA (Skill Interactive ERA)

SIERA attempts to answer the question: what is the underlying skill level of the pitcher? And, which pitchers are more successful at limiting hits and preventing runs?

Excellent 2.90
Great 3.25
Above Average 3.75
Average 3.90
Below Average 4.20
Poor 4.50
Awful 5.00

DEFENSE

UZR (Ultimate Zone Rating)

UZR tries to quantify how many runs a player saved or gave up through their fielding prowess (or lack thereof)

Gold Glove Caliber +15
Great +10
Above Average +5
Average 0
Below Average -5
Poor -10
Awful -15
: 0.940 Excellent 0.900 Great 0.860 Above Average 0.835 Average 0.800 Below Average 0.750 Poor 0.700 Awful

RZR (Revised Zone Rating)

Measures the proportion of balls hit into a fielder’s zone that he successfully converted into an out; has been more recently replaced by UZR and DRS.

Excellent 0.940
Great 0.900
Above Average 0.860
Average 0.835
Below Average 0.800
Poor 0.750
Awful 0.700

DRS (Defensive Runs Scored)

Rates a player as above or below average on defense focusing on how many runs a player saved or allowed compared to the average player at his position.

Gold Glove Caliber +15
Great +10
Above Average +5
Average 0
Below Average -5
Poor -10
Awful -15

DEF (Defensive Runs Above Average)

Measures a player’s defensive value relative to league average; DEF adds in positional adjustment to compare defensive value across positions with different baselines.

Gold Glove Caliber +20
Great +12
Above Average +4
Average 0
Below Average -4
Poor -12
Awful -20