Baseball Strike Zone

status="ready" — six pitches, 2 out in the bottom of the 7th. Press play and the at-bat replays pitch by pitch; the count in the header moves with it (0-0 → 2-2) and the result only appears on the last pitch.

At-bat · bottom 7th

R. Marchetti vs D. Okafor (R)

Apr 18 · 7:07 PM ET · Ridgeview at Harbor

0-0

Bot 7th · 2 out

Pitch 196 mphfour-seam2353 rpm→ called strike

middle-middle · shadow zone · 96% called-strike chance · first-pitch strike, outer half

called strike

FF four-seam

Shading is called-strike chance: 90% / 50% on the rulebook line / 10%.

Pitch 1 of 6

Every pitch of the at-bat in order, with the count before it, its type, velocity, location in feet from the middle of the plate and above the ground, attack zone, called-strike chance and outcome.
Pitch	Count	Type	Velocity	Location	Attack zone	Called-strike chance	Outcome	Note
1	0-0	four-seam	96 mph	0.3 ft across, 3.1 ft up	shadow zone	96%	called strike	first-pitch strike, outer half
2	0-1	slider	87 mph	0.9 ft across, 1.3 ft up	chase zone	5%	ball	buried it, no chase
3	1-1	four-seam	96 mph	-0.2 ft across, 3.4 ft up	shadow zone	53%	foul	late on the fastball at the letters
4	1-2	changeup	88 mph	-0.6 ft across, 1.3 ft up	chase zone	2%	ball	arm-side fade, dropped under the zone
5	2-2	four-seam	96 mph	-0.4 ft across, 3.6 ft up	shadow zone	14%	foul	fouled it straight back
6	2-2	slider	88 mph	0.7 ft across, 1.1 ft up	chase zone	1%	swinging strike	same tunnel as the fastball, gone at the end

Strikeout swinging

status="empty" — the at-bat is on deck, so the zone is drawn and nothing else

At-bat · bottom 7th

R. Marchetti vs D. Okafor (R)

Apr 18 · 7:07 PM ET · Ridgeview at Harbor

No pitches tracked yet

Every pitch lands here as it is thrown — outcome by shape, pitch type by colour, in the order the at-bat was worked.

status="loading" — the skeleton keeps the plot, the transport and the pitch rail

At-bat · bottom 7th

R. Marchetti vs D. Okafor (R)

Apr 18 · 7:07 PM ET · Ridgeview at Harbor

status="error" + onRetry — the Try again button only renders when onRetry is passed

At-bat · bottom 7th

R. Marchetti vs D. Okafor (R)

Apr 18 · 7:07 PM ET · Ridgeview at Harbor

Couldn't load this at-bat

The pitch feed didn't respond.

Controlled + paused mid at-bat — pitchIndex comes from the parent and onPitchIndexChangegoes back to it, so playback, the step buttons and the rail all move the parent's state.

parent state: pitch 4 of 6

At-bat · bottom 7th

R. Marchetti vs D. Okafor (R)

Apr 18 · 7:07 PM ET · Ridgeview at Harbor

1-2

Bot 7th · 2 out

Pitch 488 mphchangeup1742 rpm→ ball

down and in · chase zone · 2% called-strike chance · arm-side fade, dropped under the zone

called strike
ball
foul

FF four-seam
SL slider
CH changeup

Shading is called-strike chance: 90% / 50% on the rulebook line / 10%.

Pitch 4 of 6

Every pitch of the at-bat in order, with the count before it, its type, velocity, location in feet from the middle of the plate and above the ground, attack zone, called-strike chance and outcome.
Pitch	Count	Type	Velocity	Location	Attack zone	Called-strike chance	Outcome	Note
1	0-0	four-seam	96 mph	0.3 ft across, 3.1 ft up	shadow zone	96%	called strike	first-pitch strike, outer half
2	0-1	slider	87 mph	0.9 ft across, 1.3 ft up	chase zone	5%	ball	buried it, no chase
3	1-1	four-seam	96 mph	-0.2 ft across, 3.4 ft up	shadow zone	53%	foul	late on the fastball at the letters
4	1-2	changeup	88 mph	-0.6 ft across, 1.3 ft up	chase zone	2%	ball	arm-side fade, dropped under the zone
5	2-2	four-seam	96 mph	-0.4 ft across, 3.6 ft up	shadow zone	14%	foul	fouled it straight back
6	2-2	slider	88 mph	0.7 ft across, 1.1 ft up	chase zone	1%	swinging strike	same tunnel as the fastball, gone at the end

Strikeout swinging

trail="single" with defaultPitchIndex={2} — only the pitch under the playhead is drawn, for a board that has to read from across the room. The uncontrolled leg: the card starts on pitch 3 and owns the playhead from there.

At-bat · bottom 7th

R. Marchetti vs D. Okafor (R)

Apr 18 · 7:07 PM ET · Ridgeview at Harbor

1-1

Bot 7th · 2 out

Pitch 396 mphfour-seam2405 rpm→ foul

middle-middle · shadow zone · 53% called-strike chance · late on the fastball at the letters

called strike
ball
foul

FF four-seam
SL slider

Shading is called-strike chance: 90% / 50% on the rulebook line / 10%.

Pitch 3 of 6

Every pitch of the at-bat in order, with the count before it, its type, velocity, location in feet from the middle of the plate and above the ground, attack zone, called-strike chance and outcome.
Pitch	Count	Type	Velocity	Location	Attack zone	Called-strike chance	Outcome	Note
1	0-0	four-seam	96 mph	0.3 ft across, 3.1 ft up	shadow zone	96%	called strike	first-pitch strike, outer half
2	0-1	slider	87 mph	0.9 ft across, 1.3 ft up	chase zone	5%	ball	buried it, no chase
3	1-1	four-seam	96 mph	-0.2 ft across, 3.4 ft up	shadow zone	53%	foul	late on the fastball at the letters
4	1-2	changeup	88 mph	-0.6 ft across, 1.3 ft up	chase zone	2%	ball	arm-side fade, dropped under the zone
5	2-2	four-seam	96 mph	-0.4 ft across, 3.6 ft up	shadow zone	14%	foul	fouled it straight back
6	2-2	slider	88 mph	0.7 ft across, 1.1 ft up	chase zone	1%	swinging strike	same tunnel as the fastball, gone at the end

Strikeout swinging

Degenerate feed — an upside-down strike zone (league-average zone drawn instead), one pitch thrown at the backstop and one spiked outside the frame (both pulled to the edge, ringed and counted), one the tracker never saw, a velocity the gun missed, a count that starts 2-1 and keeps going past ball four, and a batter name too long for the line. Nothing is dropped in silence.

At-bat · messy feed

R. Marchetti vs Maximiliano Constantinopoulos-Featherstonehaugh (L)

Apr 18 · 7:07 PM ET · Ridgeview at Harbor

2-1

Bot 7th · 2 out

2 pitches landed outside the drawn area — pulled to the edge, ringed with a dashed circle, and still counted.

1 pitch has no tracked location — still in the sequence, the count and the table, just not on the plot.

This batter's zone wasn't usable, so a league-average 1.5–3.5 ft zone is drawn.

Pitch 194 mphfour-seam→ ball

up and away · waste zone · 0% called-strike chance · sailed to the backstop

ball

FF four-seam

Shading is called-strike chance: 90% / 50% on the rulebook line / 10%.

Pitch 1 of 4

Every pitch of the at-bat in order, with the count before it, its type, velocity, location in feet from the middle of the plate and above the ground, attack zone, called-strike chance and outcome.
Pitch	Count	Type	Velocity	Location	Attack zone	Called-strike chance	Outcome	Note
1	2-1	four-seam	94 mph	-3.4 ft across, 5.9 ft up (outside the drawn area)	waste zone	0%	ball	sailed to the backstop
2	3-1	sweeper	81 mph	not tracked	—	—	ball	tracker lost it in the lights
3	3-1	cutter	velo not tracked	2.6 ft across, 0.1 ft up (outside the drawn area)	waste zone	0%	ball	spiked it, catcher blocked
4	3-1	sinker	93 mph	0.1 ft across, 2.4 ft up	heart zone	100%	in play	middle-middle, first pitch he could handle

Lineout to center field