Archive file · Specimen No. 08

Sweeper

A slider grip turned around the side of the ball, so it sweeps wide and flat to the glove side instead of biting late.

Open this like an archive drawer: grip first, source attached, shape in words, no invented spin or movement numbers. The file exists so the hold can keep moving forward.

Shape read

Drops · glove-side sweep

A wide, mostly flat sweep to the glove side. It neither rides like a four-seam nor tumbles like a curve — almost all of its movement runs sideways, with little drop beyond gravity. It looks like a fastball, then runs off the plate well before it arrives.

ShapeReputable analysis

A slider grip rotated further around the side of the ball. The index and middle fingers sit toward the outer third, the hand "gets around" the ball at release rather than cutting down through it, and a wider arm path lets the fingers sweep across the outside. That tilts the spin axis toward pure sidespin.

BreakingThe wide oneMagnus: glove-side sweep

GripReputable analysis

Open the grip file All pitches

01 / At the grip bench

Get to know the hold.

Four ways into the same specimen. Take them in order, or go straight to the detail you came for.

Sweeper / Reference model

Reputable analysisMLB.com Statcast Glossary, Sweeper (ST)

View

Hand

Keyboard: arrows switch views · F flips the hand · H lifts it

Grip geometry is schematic and shows the side-spin family; spiked and two-seam sweeper grips shift the finger posture.

01 / Hold

Start with the whole hand.

Reputable analysisMLB.com Statcast Glossary, Sweeper (ST)

Paraphrased. MLB.com: the sweeper is thrown with side-spin, "getting around" the ball, or with a two-seam grip — the gyro slider, by contrast, is thrown with bullet spin.

Keep a master file beside the hold

The complete grip notes

Start from your slider grip: index and middle on the outer third of the ball.
Rotate your hand further around the side, so you are getting around the ball, not on top of it.
Use a slightly wider arm path and let the fingers sweep across the outside at release.
Throw it with fastball intent; the wide break comes from the sidespin, not from muscling it.

Stay on the side of the ball and sweep your fingers around the outside, like spinning a frisbee. Not a downward pull.

Reputable analysisMLB.com Statcast Glossary, Sweeper (ST)

Paraphrased. MLB.com: the sweeper is thrown with side-spin, "getting around" the ball, or with a two-seam grip — the gyro slider, by contrast, is thrown with bullet spin.

MLB.com frames the sweeper grip as side-spin first: the pitcher gets around the outside of the ball, or uses a two-seam orientation, where a traditional gyro slider is thrown with bullet spin that spirals like a football.

Reputable analysisMLB.com Statcast Glossary, Sweeper (ST)

Paraphrased from the glossary entry, not quoted.

It is, mechanically, a slider family member — Driveline's slider grips, with the fingers set off-center and the ball allowed to roll from the hand, are the same starting point; the sweeper just rotates the hand further around the side for lateral spin.

Reputable analysisDriveline Baseball, How to Throw a Slider

Paraphrased. The off-center grip and let-it-slide-off cue are Driveline's; the further-around rotation is the sweeper variation.

A big-league pitcher will often carry two distinct slider grips — one for the sweeper, one for the gyro slider — and pick by intent: the sweeper to sweep a same-handed hitter off the plate, the gyro slider to bury one with a late, short bite.

Reputable analysisMLB.com, Explaining the sweeper (slider vs sweeper break)

Paraphrased. MLB.com's explainer cites a pitcher describing his two separate slider grips.

Release Room

Translate the hold into a release

Grip shape only matters if the release makes sense. Read pressure, thumb support, and ball depth before you read the pitch shape.

Hold

Firm but free — the ball has to roll from the side, not be muscled down.

Pressure

Primary sidespin pressure

Leave

Sweep the fingers around the outside of the ball, like spinning a frisbee, instead of pulling straight down.

It is thrown a touch slower than a slider, with the hand staying on the side and the fingers sweeping around the outside instead of pulling down. The wide break is bought with that around-the-ball action and a spin axis tilted toward pure sidespin.

Reputable analysisMLB.com, Explaining the sweeper (slider vs sweeper break)

Paraphrased from MLB.com's sweeper explainer; the grip and feel description is in the atlas's own words.

Movement

Sidespin, not bullet spin. The Magnus force points sideways, so it sweeps wide and flat instead of biting late like a gyro slider.

The read is shape, not a gauge. The spin words explain why it moves that way, and every prose claim still carries its source.

Shape

Drops · glove-side sweep

Reputable analysisMLB.com, Explaining the sweeper (slider vs sweeper break)

Spin words

Tilted toward pure sidespin: the axis lies nearly sideways for a right-hander, almost flat across the ball, so the spin does its Magnus work across the side. That is the sweeper's whole identity and the opposite of the gyro slider, whose axis points at the catcher and spins like a thrown football.

Reputable analysisMLB.com Statcast Glossary, Sweeper (ST)

Craft read

A sweeper spins on its side, axis lying flat across the ball instead of pointing at the catcher. That turns the same air force that lifts a fastball into a sideways push, so the ball sweeps a long way to the glove side and barely drops. It looks like a fastball, then runs off the plate well before it gets there.

The one teaching sentence

A gyro slider points its spin axis at the catcher and spirals like a football, so the spin makes almost no Magnus force and the pitch breaks late and short. A sweeper tilts that axis toward pure sidespin, so the same Magnus force that lifts a four-seam now pushes sideways — a wide, glove-side sweep with little drop. Same family as the slider, opposite Magnus budget.

Reputable analysisMLB.com Statcast Glossary, Sweeper (ST)

Master Files

The master files

Three reference sweepers, three ways to win with the side-spin sweep. The visual is our own seam schematic. What sets each version apart lives in the read, how the arm shapes the sweep, not a gauge.

Shohei Ohtani

The reference sweeper — "maybe the best sweeper in the Majors," per MLB.com — and a study in reshaping a pitch year to year as he hunts the best shape.

The widest, most violent sweep in the game, and never the same shape two years running — he keeps recutting it, hunting more reach off the side. The benchmark every other sweeper gets measured against by eye.

Reputable analysisMLB.com, Shohei Ohtani's 2025 pitching debut — a Statcast breakdown/ 2025

Freddy Peralta

A swing-and-miss sweeper folded into a four-seam-heavy arsenal — shown because the shape is the lesson, not the sample size.

A sharp, late sweep that plays off his fastball-first look: hitters geared for the ride get the floor pulled sideways instead. The break does the work; gravity carries most of the small drop.

Reputable analysisBaseball Savant (Statcast), Freddy Peralta/ 2025

Yu Darvish

The arsenal artist: the sweeper is one shape among many he files away, thrown sparingly and precisely rather than as a primary.

One sweep among a deep deck of shapes — thrown sparingly and placed precisely, a glove-side look he reaches for to keep a hitter from sitting on anything. Craft over volume.

Reputable analysisBaseball Savant (Statcast), Yu Darvish/ 2025

The colophon

Every claim, sourced

Follow a claim back to the person or record behind it. Confidence labels distinguish firsthand accounts, analysis, and secondhand attribution; the notes preserve what remains uncertain.

Official dataPitcher's own wordsCoach-observedReputable analysisSecondhand, attributed

108 double stitches, 216 individual · seam-informed schematic · as of the dates above

Keep following the pitch

A hold is a beginning.

Set another grip beside it, meet a practitioner, or add what you noticed to the conversation.

Another breaking in the collection

Set it beside the 12-6 curve.

The hand gets on top of the ball so the fingers impart pure topspin. The middle finger leverages a seam, the index rests on the leather beside it, the thumb sits underneath on a seam, and the ball is tucked back toward the palm to load spin.

Reputable analysisDriveline Baseball, How to Throw a Curveball

Paraphrased from Driveline, not quoted. Spike and knuckle variants are a common feel-based alternative.

Compare these two grips

Others in the breaking

12-6 curveball Slider

Tier 03 / Field Notes

Field notes from the bullpen.

Every pitcher fiddles. A thumb creeps lower, a seam catches more leather, a cue from a coach suddenly makes the pitch move. Pitch Atlas files those experiments as specimens with context, so the small discoveries stop disappearing into group chats and comment sections.

How notes rank

Evidence and context, never who shouts loudest.

There is no single correct way to throw a pitch, but there are better and worse claims. A funny line should never outrank a tested grip. So notes do not rise on raw votes. They rise on weighted signals - provenance and adoption first.

35%
Provenance
Source tier and evidence. A coach-observed note with a link outranks an unverified hunch with none.
20%
Adoption
How many other pitchers independently tried the same tweak. Real replication, not passive clicks.
20%
Usefulness
Marked useful, measured against views so a small loud crowd cannot stuff the rank.
15%
Context match
How close a note is to your level, slot, and pace context. Computed in your session, never stored.
10%
Community confidence
Considered practice: a real sample size behind the claim, not one good bullpen.

The vocabulary

Field Note: One pitcher's report on a grip variant.
Variant: A specific, named change from the canonical grip.
Tried This: A second contributor replicating the tweak.
Coach Note: A coach reporting on an arm they work with.
Source Challenge: A standing request for the evidence behind a claim.
Provenance: The source tier and evidence that set a note’s rank.
Adoption: How many others independently tried it.
Needs Evidence: A note flagged for missing support, kept visible.

Your bullpen card

0 pts

Filing as an unclaimed contributor · anonymous.

Log a field note

Throw the sweeper with a wrinkle of your own? Add it. Label where it comes from: your own report, a coach, or a hunch. Keep it to grip and technique only. No medical, injury, workload, or youth-training prescriptions. Every contribution keeps its source context.

Field notes for the sweeper

Keeping the bullpen honest

Field Notes are live for grip and technique only. No medical, injury, workload, or youth-training prescriptions. Every note carries a source and confidence label, and contributors can report problems. No abuse, no personal attacks, no off-topic spam, nothing aimed at minors. New field notes stay private until review. See a problem with a public note? Use Report on it; a note flagged by enough people is hidden automatically until it is checked.

Every community variant carries the same source and confidence labels as the records above. Nothing appears here unsourced, and no count is shown until it is real.

What did you notice? Ask about a detail, share a firsthand observation, or add a source to the conversation.