Baseball Pitcher Game Score Calculator
Enter a pitching line to see the original Bill James Game Score and Tom Tango Game Score v2 side by side. The calculator treats 6.1 and 6.2 innings as one or two outs, not decimal innings.
Bill James Game Score56
- Tom Tango Game Score v2
- 54
- V2 difference
- -2
- Scoreless outs needed for target
- 8
- Pitching line needed for target
- 8.2 IP total (2.2 scoreless IP added)
Point breakdown
| Component | Bill James | Tom Tango v2 |
|---|---|---|
| Starting score | +50 | +40 |
| Outs recorded | +18 | +36 |
| Completed innings after the fourth | +4 | n/a |
| Strikeouts | +6 | +6 |
| Hits allowed | -12 | -12 |
| Walks allowed | -2 | -4 |
| Earned runs | -8 | n/a |
| Unearned runs | 0 | n/a |
| Runs allowed | n/a | -6 |
| Home runs allowed | n/a | -6 |
| Final score | 56 | 54 |
Current line: 6.0 IP, 6 K, 6 H, 2 BB, 2 ER, 0 UER, 1 HR.
Target calculation uses the Tom Tango v2 formula and assumes any added outs are scoreless with no extra baserunners or strikeouts.
How to use this calculator
- Enter full completed innings in the first field.
- Choose any extra outs from an unfinished inning in the additional outs field.
- Enter strikeouts, hits, walks, earned runs, unearned runs, and home runs from the official line.
- Set a target score and choose the formula to see the minimum scoreless outs needed to reach it.
How Game Score is calculated
Game Score is a compact way to summarize a pitcher's start from the box score. The original Bill James version starts at 50 points. Tom Tango's version 2 starts at 40 points, values outs more heavily, charges walks more heavily, counts all runs together, and adds a separate home run penalty.
This calculator first converts the pitching line into outs. If a pitcher worked six complete innings plus two outs, enter 6 completed innings and 2 additional outs. That is 20 outs. It is not 6.2 decimal innings.
For the Bill James formula, let O be outs, B be completed innings after the fourth, K be strikeouts, H be hits, ER be earned runs, UER be unearned runs, and BB be walks:
James = 50 + O + 2B + K - 2H - 4ER - 2UER - BB
For the Tango formula, let HR be home runs allowed:
Tango = 40 + 2O + K - 2BB - 2H - 3(ER + UER) - 6HR
What moves the score most
Run prevention and innings drive both versions. The Bill James formula gives one point for each out and two extra points for each completed inning after the fourth. The Tango formula gives two points for every out, so it rewards length more steadily and does not need the extra-inning bonus.
Strikeouts add one point in both versions. Hits cost two points in both versions. Walks cost one point in the Bill James version and two in the Tango version. Home runs count as hits in both formulas, then receive an additional six-point penalty in the Tango formula.
How the target projection works
The target result tests additional scoreless outs one at a time. For each test it keeps hits, walks, runs, home runs, and strikeouts unchanged, adds the outs, recalculates the selected formula, and returns the first number of outs that reaches the target.
What this calculator leaves out
Game Score is descriptive box-score math. It does not adjust for opponent quality, ballpark, catcher framing, defense, inherited runners, pitch count, or the run environment of the league. It also says less about one-inning relief outings than about starts, because the formulas were built around starting pitchers.
Worked example
Suppose a starter throws 6.0 innings with 6 strikeouts, 6 hits, 2 walks, 2 earned runs, no unearned runs, and 1 home run. The total is 18 outs, and the Bill James completed-inning bonus is 4 points because the pitcher completed two innings after the fourth.
The Bill James score is 50 + 18 + 4 + 6 - 12 - 8 - 0 - 2 = 56. The Tango score is 40 + 36 + 6 - 4 - 12 - 6 - 6 = 54. With a Tango target of 70, the pitcher would need 8 additional scoreless outs, taking the line to 8.2 innings pitched.
Common questions
What is a good Game Score for a starting pitcher?
A score around 50 is roughly an ordinary start in the original scale. Scores in the 60s are solid, scores in the 70s are strong, and scores above 90 usually mean a dominant start with length, strikeouts, and very little damage.
How does Tom Tango's Game Score differ from Bill James' formula?
The Tango version starts at 40 instead of 50, gives two points per out, charges two points for each walk, treats earned and unearned runs the same, and subtracts six extra points for each home run. The original Bill James formula has a completed-inning bonus after the fourth inning and penalizes earned runs more than unearned runs.
Why does Game Score v2 penalize home runs separately?
A home run is already a hit, but it also guarantees at least one run and reflects a more damaging event than most singles. The Tango formula subtracts the ordinary hit penalty and then subtracts six more points for each home run allowed.
How do I enter 6.1 or 6.2 innings pitched?
Enter 6 as completed innings. Then choose 1 additional out for 6.1 innings or 2 additional outs for 6.2 innings. Baseball innings notation counts outs after the decimal, so 6.2 means six innings and two outs, not six and two-tenths innings.
Can a pitcher's Game Score exceed 100 or fall below zero?
Yes. Game Score is not clamped to a 0 to 100 scale. Kerry Wood scored 105 in his 20-strikeout, one-hit shutout on May 6, 1998 under the Bill James formula, while very short or heavily damaged outings can fall below zero.
Does Game Score work for relief pitchers?
It can be calculated for any pitcher if you have the line, but the interpretation is weaker for relievers. The formulas reward length, and most relievers do not have enough innings for the score to mean the same thing it does for a starter.