dAImond Inning

Baseball scorekeeping guide

How to keep score in baseball

Every box on a scorecard is a tiny diamond. Trace the batter around the bases, jot what happened, and shade it in when they score. Learn the core marks below and you can score a whole game with a single pen.

Example baseball and softball scorecard
1B home 1st 2nd 3rd

One box, one plate appearance

The grid is players down the side, innings across the top. Where a row meets a column is one batter's turn — and inside it is a little diamond shaped just like the field.

  1. Write what happened in the middle (a hit, an out, a walk).
  2. Darken each base path as the runner advances — even later, on someone else's at-bat.
  3. Shade the diamond solid the moment they cross home plate. A filled diamond = a run.

Step 1 · Learn the fielders, 1–9

Outs are written with the numbers of the fielders who made the play — never their names. Memorize these once and the rest is easy. A ground ball from short to first is just 6–3.

1 2 3 4 5 6 7 8 9
  • 1 Pitcher
  • 2 Catcher
  • 3 First base
  • 4 Second base
  • 5 Third base
  • 6 Shortstop
  • 7 Left field
  • 8 Center field
  • 9 Right field

Step 2 · The marks for every play

A lit base path means the batter reached; an empty diamond with a mark means an out. That contrast is the whole language — here it is, play by play.

Score in the style you already use. Every scorekeeper has habits — a backward K, just the fielder's number, two slashes for a double. dAImond Inning is trained on the common variants, so you don't have to relearn a thing. Each card shows the main mark plus the other forms the reader accepts (the also row). One clear, common mark per box is all it needs.

Reached base

1B
Single · 1BReached first. Darken home → first.
S–
2B
Double · 2BTwo bases. Light the path to second.
D=
3B
Triple · 3BAll the way to third.
T≡
HR
Home run · HRScored on the swing — fill it solid.
4B★
BB
Walk · BBFour balls. To first without a hit.
W
IBB
Intentional walk · IBBWaved to first on purpose.
IW
HBP
Hit by pitch · HBPPlunked. Also a free base.
HP
E5
Error · E5Safe on a fielder's miss — the number is the fielder who erred.
E-5E6
FC
Fielder's choice · FCSafe, but a runner was put out instead.
FC6-4

Hits and the diamond

Read the cell in two layers. Small hash marks identify the hit; the heavy base path records how far the runner actually traveled. Keeping those jobs separate prevents a later stolen base or wild pitch from turning a single into a double.

1B
One hash = singleThe batter reached first on the hit.
2B
Two hashes = doubleThree hashes similarly mark a triple.
SB 1B
Write why they advancedPlace SB, WP, PB, or BK beside that path.
RUN
Filled diamond = runFill only after the runner crosses home—not merely for an RBI.
  • Home run: complete every path immediately and write HR.
  • RBI: note the RBI beside the batter's result; the scoring runner gets the filled diamond.
  • Runner put out: end the final path with a short black slash and record the numbered out.

Made an out

K
Strikeout · KSwinging. A backward K means called.
KSO
F8
Flyout · F8Caught on the fly by center field (8).
8F-8
6–3
Groundout · 6–3Short fielded it, threw to first.
63G6-3
L7
Lineout · L7Lined right to left field (7).
7LD7
6–4–3 DP
Double play · 6–4–3Two outs on one ball: short → second → first.
DP4-6-3
SAC
Sacrifice · SACOut on purpose to move a runner up.
SHSF

Step 3 · Mark substitutions at the boundary

Keep every replacement in the same batting-order row, directly below the player who left. The heavy line belongs at the exact moment ownership changes—not simply somewhere in the inning.

PH

Left line · Pinch hitter

The new hitter owns this plate appearance, so the entry line sits before the play.

1B

Right line · Pinch runner

The starter still owns the play that put them on base. The right line says PR entered afterward.

DEF

Right line · Defensive sub

Place the boundary after the outgoing player's last completed cell, then list the replacement and new position below.

Write the role when the player enters: PH for pinch hitter, PR for pinch runner, or the new defensive position. If a pinch runner stays in the game and later bats, keep using that substitute line—their later plate appearance needs no second entry mark.

Pitching changes are separate: use a heavy horizontal boundary in the pitching register and start the reliever on a new line.

Common scorekeeping symbols

Notation varies by scorekeeper. These widely used forms cover the play symbols most likely to appear on a paper card.

Reached base

1B / S / –
Single
2B / D / =
Double
3B / T / ≡
Triple
HR
Home run
BB / IBB
Walk / intentional walk
HBP / HP
Hit by pitch
FC / E6
Fielder's choice / error by shortstop

Recorded an out

K / K
Swinging / called strikeout
6–3 / G63
Groundout, shortstop to first
F8 / L7 / P4
Flyout / lineout / pop out
DP / TP
Double play / triple play
SH / SAC
Sacrifice bunt
SF
Sacrifice fly
FO / U
Force out / unassisted

Runner events

SB / CS
Stolen base / caught stealing
WP / PB
Wild pitch / passed ball
BK
Balk
PO
Pickoff
RBI
Run batted in
PH / PR
Pinch hitter / pinch runner

Reference conventions: BaseballScorecard.org guide and MLB's How to Keep Score.

Step 4 · Read a real inning

Now watch four boxes tell a story. The trick beginners miss: when a later batter drives someone in, you go back to that runner's box and finish their trip around the bases.

1B
1 Singles — then comes around to score, so the box gets filled in.
K
2 Strikes out. 1 out.
2B RBI
3 Doubles and drives in runner 1. 1 run.
6–3
4 Grounds out. 2 outs, runner still on second.

End of the frame so far: 1 run, 2 hits, 2 outs. Tally runs and hits in the little boxes at the bottom of each inning column, and your scorecard adds up the whole game for you.

Step 5 · Plot hits on the spray chart

The little field in the corner of the scorebook is a spray chart — drop a dot where each batted ball lands. One extra habit turns it into data dAImond Inning can read back automatically: number your hits.

400 375 375 330 330 1 2 3 4
  1. Dot where it lands. Mark the spot on the field for every hit. (Outs in play can get a dot too — they just don't need a number.)
  2. Number each hit in order. First hit of the game is 1, the next is 2, and so on — one running count.
  3. Repeat the number in the play cell. The same number in both places is the only link the scanner needs to pin that hit to its location.

Strikeouts, walks, and hit-by-pitches never get a dot — the ball never reached the field. Keep each team on its own dot color, just like the visitor / home dots you already use.

2B 2
In the play cellTuck the number in a corner so it isn't mistaken for the play.
same number →
2
On the spray chartSame number beside the dot where the ball landed.

Scoring for a clean scan

dAImond Inning reads your paper scorebook into stats. A few habits make the read near-perfect.

1

Use dark ink

Blue or black pen reads better than pencil, especially under stadium lights.

2

Keep rows clean

Crossouts are fine — just don't write names into the inning header or summary columns.

3

Shoot the full page

All four corners in frame, camera square to the sheet, no shadow over the lineup.

Ready to digitize one?

Upload a scorecard and review the flagged cells before exporting stats.

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