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Seth Halvorsen

#54 - Relief Pitcher

Colorado Rockies

Bats / Throws Right / Right
Date of Birth 2/18/2000 (26)
Height, Weight 6'2", 225 lb
Hometown Chicago, IL

2026 Season Stats

Needs more playing time to qualify
MLB Rank MLB Average
Sv IP ERA WHIP K% BB%
0 2.0 0.00 1.00 25.0% 25.0%
- 1
Sv
- 10.0
IP
- 5.21
ERA
- 1.53
WHIP
- 22.1%
K%
- 11.0%
BB%
FB MPH SwStr% CSW% Str-ICR MTK% PLV PLA
98.8 8.8% 23.5% 50.0% 5.9% 4.40 5.21
- 94.2
FB MPH
- 12.0%
SwStr%
- 28.6%
CSW%
- 49.8%
Str-ICR
- 4.2%
MTK%
- 4.97
PLV
- 3.58
PLA

Articles

4/27/2026Fantasy Baseball Relief Pitcher Roundup: 4/26Rick Graham

4/24/2026Fantasy Baseball Relief Pitcher Roundup: 4/23Rick Graham

4/24/2026Relief Pitcher Streamer Rankings Fantasy Baseball: 4/24Rick Graham

3/13/2026Top 300 Relievers for Fantasy Baseball 2026 - UPDATEDRick Graham

10/17/2025Top 100 Closers for Fantasy Baseball 2026Rick Graham

See More Articles
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Seth Halvorsen Overview

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team G GS IP W-L Sv Hld ERA WHIP xERA FIP xFIP PLA K% BB% H/9 HR/9 BABIP HR/FB% LOB% ICR GB% SwStr% CSW% IPR PLV
2024 COL 12 0 12.1 2-1 2 2 1.46 0.81 2.75 3.91 2.94 2.45 28.3% 4.3% 5.8 1.46 .214 33.3% 97.6% 23.3% 48.3% 15.7% 33.7% 0.69 5.18
2025 COL 42 0 39.2 1-2 11 4 4.99 1.56 5.72 5.23 4.40 3.68 20.9% 11.6% 9.3 1.59 .315 29.2% 69.0% 32.8% 56.5% 14.2% 28.6% 0.46 4.82
2026 COL 2 0 2.0 0-0 0 2 0.00 1.00 4.70 4.13 4.13 5.21 25.0% 25.0% 0.0 0.00 .000 - 100.0% 50.0% 75.0% 8.8% 23.5% 0.47 4.40
RP MLB Percentile - - - --- - - - - - - - - - - - - - - - - - - - - -
RP MLB AVG 8 0 10.0 1-1 1 1 5.21 1.53 4.85 4.86 4.64 3.58 22.1% 11.0% 9.1 1.29 .301 18.9% 71.5% 38.3% 43.9% 12.0% 28.6% 0.49 4.97
Career 56 0 54.0 3-3 13 8 4.00 1.37 5.00 4.86 4.05 3.46 22.6% 10.6% 8.2 1.50 .286 30.0% 73.7% 31.3% 55.4% 14.3% 29.5% 0.51 4.88

Seth Halvorsen Repertoire

2024 2025 2026 All
Hide MLB Percentile | Hide MLB Average

Seth Halvorsen Game Log

Seth Halvorsen Standard

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team G GS IP W-L QS Sv Hld P Strikes Balls TBF H 1B 2B 3B HR K BB HB WP
2024 COL 12 0 12.1 2-1 0 2 2 178 120 58 46 8 6 0 0 2 13 2 1 0
2025 COL 42 0 39.2 1-2 0 11 4 636 398 238 172 41 23 10 1 7 36 20 0 3
2026 COL 2 0 2.0 0-0 0 0 2 34 21 13 8 0 0 0 0 0 2 2 0 0
RP MLB Percentile - - - --- - - - - - - - - - - - - - - - -
RP MLB AVG 8 0 10.0 1-1 0 1 1 180 114 67 46 10 7 2 0 1 10 5 1 1
Career 56 0 54.0 3-3 0 13 8 848 539 309 226 49 29 10 1 9 51 24 1 3

Seth Halvorsen Advanced

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team K% BB% AVG SLG OPS wOBA BABIP BACON xAVG xwOBA xBABIP xwoBACON EV FB EV LA xERA
2024 COL 28.3% 4.3% .186 .326 .565 .250 .214 .267 .217 .263 .295 .335 92.1 79.7 15.4 2.75
2025 COL 20.9% 11.6% .273 .493 .850 .363 .315 .357 .279 .372 .318 .433 88.2 86.6 6.9 5.72
2026 COL 25.0% 25.0% .000 .000 .250 .177 .000 .000 .210 .343 .315 .332 95.0 - 2.8 4.70
RP MLB Percentile - - - - - - - - - - - - - - - -
RP MLB AVG 22.1% 11.0% .249 .407 .747 .332 .301 .332 .243 .333 .289 .377 88.4 89.7 13.2 4.85
Career 22.6% 10.6% .246 .442 .771 .340 .286 .329 .264 .356 .313 .419 89.1 85.2 8.5 5.00

Seth Halvorsen Pitch › Mix

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team FF% (MPH) SI% (MPH) FC% (MPH) SL% (MPH) ST% (MPH) CB% (MPH) CH% (MPH) FS% (MPH) KN% (MPH) Fastball% Secondary%
2024 COL 37.1% (99.9) 19.1% (100.1) - 15.7% (88.9) - - - 28.1% (89.4) - 56.2% 43.8%
2025 COL 53.8% (100.0) 0.6% (99.3) - 19.7% (89.4) - - - 25.8% (90.8) - 54.4% 45.4%
2026 COL 64.7% (98.8) - - 26.5% (86.4) - - - 8.8% (89.5) - 64.7% 35.3%
RP MLB Percentile - - - - - - - - - - -
RP MLB AVG 34.9% (94.2) 27.0% (93.8) 20.5% (89.3) 27.6% (85.6) 23.1% (82.5) 18.2% (80.8) 18.9% (86.0) 19.9% (86.4) - (-) 47.5% 52.4%
Career 50.7% (99.9) 4.5% (100.0) - 19.1% (89.2) - - - 25.6% (90.4) - 55.2% 44.7%

Seth Halvorsen Pitch › Results

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team FF CSW% SI CSW% FC CSW% SL CSW% ST CSW% CB CSW% CH CSW% FS CSW% KN CSW% Fastball CSW% Secondary CSW%
2024 COL 31.8% (7) 38.2% (4) - 32.1% (7) - - - 34.0% (10) - 34.0% 33.3%
2025 COL 30.4% (40) 25.0% (0) - 27.2% (22) - - - 26.2% (28) - 30.3% 26.6%
2026 COL 22.7% (1) - - 22.2% (2) - - - 33.3% (0) - 22.7% 25.0%
RP MLB Percentile - - - - - - - - - - -
RP MLB AVG 26.6% (6) 28.1% (3) 28.0% (4) 30.5% (7) 28.6% (6) 28.2% (4) 22.3% (5) 25.1% (7) - (-) 28.0% 28.6%
Career 30.2% (48) 36.8% (4) - 27.8% (31) - - - 28.1% (38) - 30.8% 28.0%

Seth Halvorsen Batted Ball › Contact

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team GB% LD% FB% PU% SS% Pull% Cent% Oppo% Foul Str% PC% Fl&B% Solid% Brl% ICR
2024 COL 48.3% 20.7% 20.7% 10.3% 31.0% 26.7% 33.3% 40.0% 16.9% 75.8% 13.8% 3.4% 6.9% 23.3%
2025 COL 56.5% 16.5% 20.9% 6.1% 31.3% 46.6% 25.0% 28.4% 15.7% 66.9% 19.1% 4.3% 9.6% 32.8%
2026 COL 75.0% 25.0% 0.0% 0.0% 25.0% 25.0% 25.0% 50.0% 26.5% 50.0% 50.0% 0.0% 0.0% 50.0%
RP MLB Percentile - - - - - - - - - - - - - -
RP MLB AVG 43.9% 21.8% 24.4% 10.0% 35.0% 42.1% 33.2% 24.7% 17.4% 61.6% 24.6% 5.8% 8.1% 38.3%
Career 55.4% 17.6% 20.3% 6.8% 31.1% 42.0% 26.7% 31.3% 16.4% 68.2% 18.9% 4.1% 8.8% 31.3%

Seth Halvorsen Batted Ball › Outcomes

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team AVG wOBA BABIP BACON xAVG xwOBA xBABIP xwoBACON EV FB EV LA HR/FB ICR IPA%
2024 COL .186 .250 .214 .267 .217 .263 .295 .335 92.1 79.7 15.4 33.3% 23.3% 15.2%
2025 COL .273 .363 .315 .357 .279 .372 .318 .433 88.2 86.6 6.9 29.2% 32.8% 22.1%
2026 COL .000 .177 .000 .000 .210 .343 .315 .332 95.0 - 2.8 - 50.0% 25.0%
RP MLB Percentile - - - - - - - - - - - - - -
RP MLB AVG .249 .332 .301 .332 .243 .333 .289 .377 88.4 89.7 13.2 18.9% 38.3% 25.1%
Career .246 .340 .286 .329 .264 .356 .313 .419 89.1 85.2 8.5 30.0% 31.3% 20.8%

Seth Halvorsen Approach › Plate Discipline

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team Zone% Str% Swing% O-Sw% Whiff% Foul Str% Con% Z-Con% O-Con% CS% SwStr% CSW% BIP% PLUS% IPR Str-ICR
2024 COL 53.9% 67.4% 49.4% 24.4% 31.8% 16.9% 68.2% 77.9% 35.0% 18.0% 15.7% 33.7% 16.9% 62.9% 0.69 59.6%
2025 COL 45.4% 62.6% 48.1% 32.3% 29.4% 15.7% 70.6% 82.0% 50.9% 14.5% 14.2% 28.6% 18.2% 56.1% 0.46 50.6%
2026 COL 47.1% 61.8% 47.1% 27.8% 18.8% 26.5% 81.3% 90.9% 60.0% 14.7% 8.8% 23.5% 11.8% 61.8% 0.47 50.0%
RP MLB Percentile - - - - - - - - - - - - - - - -
RP MLB AVG 44.1% 62.8% 46.2% 30.5% 25.7% 17.4% 74.3% 83.7% 58.5% 16.6% 12.0% 28.6% 16.9% 57.3% 0.49 49.8%
Career 47.3% 63.6% 48.3% 30.6% 29.5% 16.4% 70.5% 81.3% 48.9% 15.2% 14.3% 29.5% 17.7% 57.8% 0.51 52.5%

Seth Halvorsen Approach › Locations

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team Zone% aLoc% x-mLoc% gLoc% hiLoc% y-mLoc% loLoc% iLoc% oLoc% mmLoc%
2024 COL 53.9% 43.8% 28.1% 28.1% 25.8% 29.2% 44.9% 21.3% 50.6% 9.6%
2025 COL 45.4% 45.4% 24.4% 30.2% 30.2% 23.8% 46.0% 27.9% 47.7% 6.1%
2026 COL 47.1% 20.6% 23.5% 55.9% 35.3% 23.5% 41.2% 35.3% 41.2% 5.9%
RP MLB Percentile - - - - - - - - - -
RP MLB AVG 44.1% 34.8% 26.5% 38.7% 36.3% 22.8% 40.9% 30.4% 43.2% 6.3%
Career 47.3% 44.0% 25.1% 30.8% 29.5% 24.9% 45.6% 26.8% 48.1% 6.8%

Seth Halvorsen Approach › Counts

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team Early% Behind% 2-Str% Early BIP% F-Str% TF-Str% ECS% 2-Str O-Sw% PAR%
2024 COL 54.5% 10.7% 36.0% 12.4% 69.6% 56.5% 24.7% 7.8% 20.3%
2025 COL 61.6% 11.3% 27.7% 16.3% 59.9% 47.1% 18.6% 26.1% 20.5%
2026 COL 55.9% 11.8% 32.4% 10.5% 37.5% 37.5% 15.8% 18.2% 18.2%
RP MLB Percentile - - - - - - - - -
RP MLB AVG 58.5% 13.1% 29.0% 13.8% 59.4% 49.5% 21.1% 26.4% 19.7%
Career 59.9% 11.2% 29.6% 15.4% 61.1% 48.7% 19.7% 21.1% 20.3%

Seth Halvorsen PLV

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team P PLV QP% AP% BP% Q-BP% MTK% HP HL PLA
2024 COL 178 5.18 50.0% 16.9% 33.1% 16.9% 6.2% -1.0 -3 2.45
2025 COL 636 4.82 42.1% 20.9% 36.9% 5.2% 5.0% 10.0 +9 3.68
2026 COL 34 4.40 44.1% 11.8% 44.1% 0.0% 5.9% -0.7 -1 5.21
RP MLB Percentile - - - - - - - - - -
RP MLB AVG 180 4.97 46.1% 17.9% 36.1% 10.0% 4.2% 1.5 +1 3.58
Career 848 4.88 43.9% 19.7% 36.4% 7.4% 5.3% 8.3 +6 3.46
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