Pro Baseball Terminal — MLB projections, standings & analytics

Seth Halvorsen

P · COL

26 yrs

Pitcher

Description

Position: P
Team: COL
Type: Pitcher
Bats: Right
Throws: Right
Born: 2000-02-18
Age: 26
Country: USA
Height: 6'2"
Weight: 243 lb
Last active: 2026

Career Résumé

3 seasons

Seasons	3 2024–2026
Games	72
W-L	3-3
ERA	3.95
WHIP	1.48
IP	68
SO	65
SV	13

Pitching Projections

2026 · per ~700 BF

Stat	Proj	Range (p10–p90)	vs LY
SO	157	134–206	-3
BB	70	46–85	+3
HR	21	14–32	-5
Hits	149	127–174	-10
ER	71	52–97	-8

Pitching

Regular season

Season	Tm	W	L	ERA	WHIP	G	SV	IP	SO	BB	HR	ER	xERA	Brl%
2026	COL	0	0	3.31	1.78	18	0	16.1	16	14	2	6	6.77	5.8%
2025	COL	1	2	4.99	1.56	42	11	39.2	36	21	7	22	4.36	9.5%
2024	COL	2	1	1.46	0.81	12	2	12.1	13	2	2	2	2.68	6.7%

Season	Pos	G	Inn	PO	A	E	FLD%	RF/9	OAA
2026	P	18	16.1	0	2	0	1.000	1.10	—
2025	P	42	39.2	7	5	1	.923	2.72	—
2024	P	12	12.1	1	0	0	1.000	0.73	—

Batting game log

2026 · last 2

Date		Opp	Res	AB	R	H	2B	3B	HR	RBI	BB	SO	SB
2026-06-28	@	MIN	L	0	0	0	0	0	0	0	0	0	0
2026-06-26	@	MIN	L	0	0	0	0	0	0	0	0	0	0

Pitching game log

2026 · last 20

Date		Opp	Res	Dec	IP	H	R	ER	HR	BB	SO	Pit
2026-06-28	@	MIN	L	L	0.2	3	1	1	1	0	0	15
2026-06-26	@	MIN	L	ND	1.0	0	0	0	0	0	1	10
2026-06-15	@	CHC	L	BS	0.0	1	0	0	0	1	0	10
2026-06-13	@	ATH	L	ND	0.2	0	0	0	0	1	1	25
2026-06-12	@	ATH	L	ND	0.2	2	2	2	2	1	1	22
2026-06-09	vs	CHC	W	ND	1.0	0	0	0	0	1	0	14
2026-06-05	vs	MIL	L	ND	0.2	0	0	0	0	1	1	13
2026-06-03	@	LAA	L	ND	1.0	1	0	0	0	1	0	28
2026-06-01	@	LAA	W	ND	1.1	1	0	0	0	0	1	15
2026-05-29	vs	SF	W	ND	1.2	1	0	0	0	0	2	19
2026-05-24	@	AZ	L	ND	1.0	3	2	2	0	0	1	24
2026-05-23	@	AZ	L	ND	0.1	0	0	0	0	0	1	4
2026-05-21	@	AZ	L	ND	1.0	0	0	0	0	2	2	19
2026-05-19	vs	TEX	L	ND	1.0	2	1	1	0	2	0	25
2026-05-17	vs	AZ	L	ND	1.0	1	0	0	0	0	2	14
2026-05-15	vs	AZ	L	ND	1.0	1	0	0	0	1	1	25
2026-05-12	@	PIT	L	ND	1.0	0	0	0	0	0	1	12
2026-05-10	@	PHI	L	ND	1.0	2	1	1	0	1	0	22
2026-04-26	@	NYM	W	H	1.0	0	0	0	0	1	0	15
2026-04-23	vs	SD	L	H	1.0	0	0	0	0	1	2	19

Pitching Profile2025 · vs 402

K/9

8.241

BB/9

4.85

HR/9

1.616

ERA

4.9918

WHIP

1.565

xERA

4.3632

Brl%A

9.5%28

PlayerMedian (50th)percentile vs league

Career Highs

Stat	Best	Year
Wins	2	2024
SO	36	2025
SV	11	2025
ERA	1.46	2024
WHIP	0.81	2024

Comparable Players

2025 · stat-profile similarity

Sam LongKC30y
5.36 ERA · 33 K · 1.74 WHIP
85%
vs
Ryne StanekNYM34y
5.30 ERA · 58 K · 1.57 WHIP
82%
vs
Yuki MatsuiSD30y
3.98 ERA · 61 K · 1.36 WHIP
80%
vs
Hayden BirdsongSF24y
4.80 ERA · 68 K · 1.49 WHIP
79%
vs
Cole HenryWSH26y
4.27 ERA · 52 K · 1.42 WHIP
79%
vs

Career Arc

ERA by season · taller = better

Year over Year

pitching trajectory

Yr	Tm	W	ERA	WHIP	SO	IP
24	COL	2	1.46	0.81	13	12
25	COL	1▼	4.99▲	1.56▲	36▲	40▲
26	COL	0▼	3.31▼	1.78▲	16▼	16▼

Career Milestones

chase to the next mark

Wins3

47 to 50

Strikeouts65

935 to 1,000

Saves13

87 to 100

Season

Pitch Arsenal

2025 · Statcast

Pitch	Use	Velo	Spin
4-Seam	54%	100.0	2268
Splitter	26%	90.8	1676
Slider	20%	89.4	2499

Plate Discipline

2025 · induced

30.1%

Chase

lg 28.5%

66.8%

Z-Swing

lg 67%

28.8%

Whiff

lg 24.5%

71.2%

Contact

lg 76%

48.8%

Zone

lg 48.5%

28.8%

CSW

lg 28%

666 pitches · green/red vs league avg

Statcast Trend

xERA by season · taller = better

Barrel% Against by season · taller = better

Per game	2.1
Ceiling (90th)	5.7
Floor (10th)	-2.2
Std dev	2.9
Boom rate	35%
Bust rate	30%
Profile	Volatile