William Kempner

#71

Miami Marlins

Pitcher Throws R

6'0", 222 lbs · Born Jun 18, 2001 · Debut 2026

2.92

2026 ERA

1-0

2026 W-L

12.1

2026 IP

2026 K

Common Live

⚾ MLB The Show 2026 · ✓ Verified

📅

No upcoming lineup appearance found for this player.

Check back closer to game time, or see Recent Form for latest performance.

Recent Form Snapshot

Recent form data not yet available.

Career Stats

12.1

2.92

ERA

0.970

WHIP

2026 Season

12.1

2.92

ERA

0.970

WHIP

Recent Game Log

Date	Opp	H/A	IP	ER	K	BB	HR	PC	W/L/S
2026-07-11	Cleveland Guardians	H	2.0	2	3	0	0	42	—
2026-07-09	Seattle Mariners	H	0.1	2	0	2	1	17	—
2026-07-04	Athletics	A	1.0	0	1	0	0	10	—
2026-06-15	Philadelphia Phillies	A	2.1	0	2	0	0	33	—
2026-06-10	Arizona Diamondbacks	H	2.0	0	3	2	0	36	W
2026-06-05	Tampa Bay Rays	H	1.1	0	1	0	0	13	—
2026-05-31	New York Mets	A	1.1	0	3	0	0	28	—
2026-05-30	New York Mets	A	1.0	0	0	0	0	12	—
2026-05-05	Baltimore Orioles	H	1.0	0	1	0	0	8	—

Recent Form

Window	G	IP	ER	K	BB	W	L	SV	ERA	WHIP
Last 5G	5	7.2	4	9	4	1	—	—	4.70	1.174
Last 10G	9	12.1	4	14	4	1	—	—	2.92	0.973

Starter / Reliever Splits

Role	G	IP	ER	H	HR	K	BB	ERA	WHIP	K/9	BB/9
Reliever	9	12.3	4	8	1	14	4	2.92	0.973	10.22	2.92

Home / Away Splits

Split	G	IP	ER	H	HR	K	BB	ERA	WHIP	K/9	BB/9
Home	5	6.7	4	6	1	8	4	5.40	1.500	10.80	5.40
Away	4	5.7	—	2	—	6	—	0.00	0.353	9.53	0.00

Pitch Count Breakdown

Range	G	IP	ER	K	BB	ERA	WHIP
1–40 Pitches	8	10.3	2	11	4	1.74	0.871
41–60 Pitches	1	2.0	2	3	—	9.00	1.500

Innings Pitched Breakdown

Range	G	IP	ER	K	BB	ERA	WHIP
< 1.0 IP	1	0.3	2	—	2	54.00	12.000
1.0–2.2 IP	8	12.0	2	14	2	1.50	0.667

Today's Pitch-Family Matchup

No scheduled/probable pitching appearance found for today. Check back closer to game time.

PardonMe Stat Review

Stat review will be added once benchmark data is available.

Pitcher Profile 2026

Top pitches by usage

Fastball

Usage: 50.0% Velo: 95.4 Whiff: 47.6% OPS-all: 0.914

Slider/Sweeper

Usage: 23.5% Velo: 81.5 Whiff: 32.3% OPS-all: 0.368

Fastball

Usage: 12.4% Velo: 93.9 Whiff: 18.2% OPS-all: 0.000

Pitcher Type: FB/SL Pitcher Primary Family: Fastball Best Pitch: FF (lowest OPS allowed) Weakest Pitch: FF (highest OPS allowed)

Pitch Arsenal 2026

Pitch	Family	Usage	Velo	Spin	Horz Move	Vert Move	Ext	Rel X	Rel Z	Strike%	Whiff%	CSW%	Lg Whiff	W.Rank	Grade	Sample
FF	Fastball	50.0%	95.4	2,403	-10.2"	+6.2"	6.2ft	-2.20	4.42	53.0%	47.6%	39.3%	23.3%	#118	—	OK
ST	Slider/Sweeper	23.5%	81.5	2,856	+7.9"	+2.6"	6.1ft	-2.33	4.60	47.3%	32.3%	27.3%	34.4%	#261	—	Small-ish
SI	Fastball	12.4%	93.9	2,237	-11.7"	+1.6"	6.2ft	-2.37	4.30	31.0%	18.2%	20.7%	17.6%	#342	—	Small
FC	Fastball	11.1%	87.4	2,608	+0.1"	+3.0"	6.2ft	-2.26	4.55	61.5%	36.4%	42.3%	30.2%	#174	—	Small
CH	Changeup	3.0%	86.2	1,313	-7.4"	-1.1"	6.2ft	-2.42	4.28	14.3%	0.0%	0.0%	33.5%	#659	—	Small

Velo = avg release speed (mph). Move in inches, induced (gravity-removed).

Pitch Results Allowed (by Family) 2026

Pitch Family	PA	AVG	OBP	SLG	OPS	K%	BB%	HR	Hard%	Brl%	OPS Rank	Sample	Read
FastballSmall-ish	40	.200	.300	.343	0.643	35.0%	10.0%	1	23.8%	4.8%	#460	Small-ish	—
Slider/SweeperSmall	17	.133	.235	.133	0.368	17.7%	5.9%	0	8.3%	0.0%	#306	Small	—
ChangeupSmall	1	.000	.000	.000	0.000	0.0%	0.0%	0	100.0%	0.0%	#1	Small	—

OPS Rank = lower OPS allowed is better. Rank 1 = best among all pitchers using that family this season.

Pitcher Summary 2026

Top pitches by usage

Fastball

Usage: 50.0% Velo: 95.4 Whiff: 47.6% OPS-all: 0.914

Slider/Sweeper

Usage: 23.5% Velo: 81.5 Whiff: 32.3% OPS-all: 0.368

Fastball

Usage: 12.4% Velo: 93.9 Whiff: 18.2% OPS-all: 0.000

Pitch mix

73.5%

23.5%

3.0%

12.4%

Total pitches this season: 234 · Reliable

MLB The Show Card Reference

William Kempner RP · Marlins

Live Common ▼ Crashing

Buy-Now

Sell-Now Net

Flip Profit

—

24h

-8 (-33.3%)

-4 (-20.0%)

Stamina 35

Pitch	Spd	Ctrl	Brk
stuff_rating	—	—	—
pitches	—	—	—

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William Kempner

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