MLB / Batter context

MLB platoon split support balance

Shows the published on-base rates by pitcher hand beside the support balance behind each selected raw gap.

Derived analysis15 published rows6 fieldsDate varies or is unrecorded; see scope

Published measurements

Choose a measurement

MeasurementPopulationOrder

The snapshot publishes only its upper platoon-gap selection, not every floor-qualified batter. A full qualified distribution or league-wide ranking cannot be checked from these rows. All rows are shown without a pooled ranking, median, or percentile.

15 matching rows; 15 contain smaller-side pa share.

CSV includes 15 matching rows, all fields, and source context; missing measurements stay blank. Published source dates and row provenance are included when available; structured provenance uses JSON cells.

MLB platoon split support balance: all published measurement fields
Entity	Smaller-side PA share	Published vs-LHP minus vs-RHP gap	Published on-base-event rate vs LHP	Published on-base-event rate vs RHP	PA vs LHP	PA vs RHP
Mitch GarverPublished upper selection	26.38%	15.2 pp	45.3%	30%	148	413
Robbie GrossmanPublished upper selection	31.81%	15.1 pp	42.7%	27.6%	286	613
Cristian PachePublished upper selection	41.13%	12.4 pp	31.5%	19.1%	146	209
Bobby DalbecPublished upper selection	33%	11.6 pp	35.8%	24.3%	134	272
Sam HaggertyPublished upper selection	49.68%	10.8 pp	39.6%	28.8%	154	156
William ContrerasPublished upper selection	29.66%	10.7 pp	43.7%	32.9%	293	695
Kevin SmithPublished upper selection	34.9%	10.4 pp	27.9%	17.5%	104	194
Rob RefsnyderPublished upper selection	47.98%	10.3 pp	42%	31.7%	219	202
Kevin NewmanPublished upper selection	38.08%	10.1 pp	37.4%	27.3%	214	348
Albert PujolsPublished upper selection	37.22%	9.7 pp	40.5%	30.8%	131	221
TJ FriedlPublished upper selection	16.22%	9.6 pp	41.7%	32.1%	132	682
José CaballeroPublished upper selection	44.29%	9.4 pp	39.5%	30.1%	124	156

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01 / Interpretation

What this measures

A share near 50% means the two published support counts are similar; a lower share means one pitcher-hand side has fewer recorded plate appearances. Read it with both rates, the published gap, and both counts.

02 / Calculation

smaller_side_support_share = min(pa_vs_l, pa_vs_r) / (pa_vs_l + pa_vs_r); platoon_delta is copied from the separately rounded published value.

Use the table to inspect available fields and the source JSON to trace the formula inputs. CSV percentage values are stored as fractions.

03 / Population & limits

15 named rows from 15 published upper selections of 394 floor-qualified batters; fixed 2022-2023 sampled Statcast corpus; at least 50 plate appearances against each pitcher hand; source corpus ID statcast_fuller_v1; source as-of timestamp 2026-07-05T02:39:36.769430+00:00; public artifact generated 2026-07-24T21:46:01.294251+00:00.

The 2022 and 2023 inputs are 18-day samples per season rather than full seasons. The source as-of and artifact generation timestamps are not individual observation dates. The source counts plate-appearance-ending rows by pitcher throwing hand (p_throws); exact individual endpoints and player IDs are not published. This showcase selection uses the published 50-PA-per-side floor; the separate claims validator uses a different 100-PA-per-side floor. The selection omits other qualified batters. Rates and the published gap are rounded separately, so subtracting displayed rates can differ from the published gap. The producer reports an on-base-event rate, but the public snapshot does not list its event set or establish official OBP; the rates are unadjusted for park, opponent, or context. Support balance describes count mix, not precision, skill, persistence, or forecast performance.

04 / Source & method references

Published source JSON Published MLB descriptive leaderboard method Published platoon split claims method Published MLB descriptive snapshot

References explain ingredients and prior methods. They do not validate this derived analysis or establish its originality.