Dynasty
Nastiest GIFs
The List
Dynasty
Nastiest GIFs
The List

Seth Lonsway

#86 - Relief Pitcher

San Francisco Giants

Bats / Throws Left / Left
Date of Birth 10/7/1998 (27)
Height, Weight 6'0", 206 lb
Hometown St. Mary's, OH

2026 Season Stats

Needs more playing time to qualify
MLB Rank MLB Average
Sv IP ERA WHIP K% BB%
0 2.0 9.00 2.50 18.2% 0.0%
216th 3
Sv
351st 46.0
IP
346th 4.22
ERA
350th 1.34
WHIP
269th 22.6%
K%
1st 9.9%
BB%
FB MPH SwStr% CSW% Str-ICR MTK% PLV PLA
91.6 9.1% 30.3% 54.5% 6.1% 5.12 2.84
283rd 94.6
FB MPH
311th 12.1%
SwStr%
86th 28.5%
CSW%
54th 51.2%
Str-ICR
285th 4.7%
MTK%
34th 4.94
PLV
54th 3.53
PLA

Articles

8/30/2026Fantasy Baseball Relief Pitcher Roundup: 8/29Rick Graham

8/30/2026MLB News & Moments: PCA 3HR GameJosh Shaw

See More Articles
PL Pro logo Get PL Pro

Exclusive Access to:

Weekly Player Rater | Live Draft Assistant Tool
2026 Season Projections | Ad-Free Website

book icon Stats Glossary

Seth Lonsway 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
2026 SF 1 0 2.0 0-0 0 0 9.00 2.50 1.63 1.09 2.28 2.84 18.2% 0.0% 22.5 0.00 .556 0.0% 40.0% 22.2% 77.8% 9.1% 30.3% 0.39 5.12
RP MLB Percentile 0 0 0 0-84 0 0 1 0 99 99 98 84 23 100 0 98 0 98 0 99 100 11 74 15 89
RP MLB AVG 37 2 46.0 3-2 3 6 4.22 1.34 4.21 4.23 4.27 3.53 22.6% 9.9% 8.3 1.12 .290 17.6% 72.6% 36.9% 43.7% 12.1% 28.5% 0.50 4.94
Career 1 0 2.0 0-0 0 0 9.00 2.50 1.63 1.09 2.28 2.84 18.2% 0.0% 22.5 0.00 .556 0.0% 40.0% 22.2% 77.8% 9.1% 30.3% 0.39 5.12

Seth Lonsway Repertoire

2026 All
Hide MLB Percentile | Hide MLB Average

Seth Lonsway Game Log

Seth Lonsway 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
2026 SF 1 0 2.0 0-0 0 0 0 33 22 11 11 5 5 0 0 0 2 0 0 0
RP MLB Percentile 0 0 0 0-84 0 0 0 0 0 100 0 100 99 99 46 98 0 100 82 74
RP MLB AVG 37 2 46.0 3-2 0 3 6 778 497 281 200 42 28 8 1 6 45 19 2 2
Career 1 0 2.0 0-0 0 0 0 33 22 11 11 5 5 0 0 0 2 0 0 0

Seth Lonsway 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
2026 SF 18.2% 0.0% .455 .455 .910 .405 .556 .556 .223 .199 .272 .243 87.2 88.6 -6.1 1.63
RP MLB Percentile 23 100 0 22 6 4 0 0 62 99 59 99 60 58 100 99
RP MLB AVG 22.6% 9.9% .240 .390 .713 .315 .290 .320 .235 .315 .279 .359 87.7 89.3 13.3 4.21
Career 18.2% 0.0% .455 .455 .910 .405 .556 .556 .223 .199 .272 .243 87.2 88.6 -6.1 1.63

Seth Lonsway 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%
2026 SF9.1% (91.3)45.5% (91.6)9.1% (88.3)-15.2% (82.6)-21.2% (83.9)-- 54.5% 45.5%
RP MLB Percentile 2 (6) 87 (19) 19 (34) - 39 (51) - 70 (21) - - 66.4% 33.1%
RP MLB AVG 38.4% (94.6) 26.5% (94.0) 20.2% (89.4) 25.8% (85.9) 21.1% (82.4) 15.6% (80.1) 16.8% (86.2) 18.5% (86.6) 43.0% (61.7) 48.4% 51.4%
Career9.1% (91.3)45.5% (91.6)9.1% (88.3)-15.2% (82.6)-21.2% (83.9)-- 54.5% 45.5%

Seth Lonsway 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%
2026 SF0.0% (0)40.0% (1)0.0% (0)-40.0% (1)-28.6% (1)-- 33.3% 26.7%
RP MLB Percentile 0 (0) 96 (4) 0 (0) - 95 (90) - 79 (78) - - 92.6% 31.3%
RP MLB AVG 26.9% (28) 27.4% (11) 26.6% (13) 29.8% (24) 28.4% (18) 26.9% (12) 21.5% (17) 22.9% (18) 20.1% (9) 27.8% 28.8%
Career0.0% (0)40.0% (1)0.0% (0)-40.0% (1)-28.6% (1)-- 33.3% 26.7%

Seth Lonsway 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%
2026 SF 77.8% 11.1% 11.1% 0.0% 11.1% 77.8% 11.1% 11.1% 9.1% 77.8% 22.2% 0.0% 0.0% 22.2%
RP MLB Percentile 100 99 1 0 100 100 0 1 0 99 70 99 99 99
RP MLB AVG 43.7% 21.6% 24.5% 10.3% 34.7% 41.0% 33.6% 25.4% 18.2% 62.9% 24.5% 5.8% 6.8% 36.9%
Career 77.8% 11.1% 11.1% 0.0% 11.1% 77.8% 11.1% 11.1% 9.1% 77.8% 22.2% 0.0% 0.0% 22.2%

Seth Lonsway 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%
2026 SF .455 .405 .556 .556 .223 .199 .272 .243 87.2 88.6 -6.1 0.0% 22.2% 18.2%
RP MLB Percentile 0 4 0 0 62 99 59 99 60 58 100 98 99 93
RP MLB AVG .240 .315 .290 .320 .235 .315 .279 .359 87.7 89.3 13.3 17.6% 36.9% 24.5%
Career .455 .405 .556 .556 .223 .199 .272 .243 87.2 88.6 -6.1 0.0% 22.2% 18.2%

Seth Lonsway 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
2026 SF 54.5% 66.7% 45.5% 20.0% 20.0% 9.1% 80.0% 75.0% 100.0% 21.2% 9.1% 30.3% 27.3% 51.5% 0.39 54.5%
RP MLB Percentile 100 83 28 0 15 0 15 95 0 98 11 74 100 1 15 83
RP MLB AVG 44.4% 63.8% 47.4% 31.8% 25.6% 18.2% 74.4% 83.9% 58.6% 16.3% 12.1% 28.5% 17.1% 58.4% 0.50 51.2%
Career 54.5% 66.7% 45.5% 20.0% 20.0% 9.1% 80.0% 75.0% 100.0% 21.2% 9.1% 30.3% 27.3% 51.5% 0.39 54.5%

Seth Lonsway Approach › Locations

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team Zone% aLoc% x-mLoc% gLoc% hiLoc% y-mLoc% loLoc% iLoc% oLoc% mmLoc%
2026 SF 54.5% 30.3% 27.3% 42.4% 21.2% 42.4% 36.4% 33.3% 39.4% 12.1%
RP MLB Percentile 100 23 46 77 3 0 27 81 19 100
RP MLB AVG 44.4% 34.5% 27.0% 38.5% 36.4% 22.9% 40.7% 29.8% 43.2% 6.6%
Career 54.5% 30.3% 27.3% 42.4% 21.2% 42.4% 36.4% 33.3% 39.4% 12.1%

Seth Lonsway 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%
2026 SF 69.7% 9.1% 21.2% 26.1% 54.5% 27.3% 21.7% 14.3% 28.6%
RP MLB Percentile 100 92 0 100 9 0 57 0 98
RP MLB AVG 58.5% 12.1% 30.0% 14.5% 61.0% 50.2% 21.1% 26.8% 19.2%
Career 69.7% 9.1% 21.2% 26.1% 54.5% 27.3% 21.7% 14.3% 28.6%

Seth Lonsway PLV

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team P PLV QP% AP% BP% Q-BP% MTK% HP HL PLA
2026 SF 33 5.12 39.4% 27.3% 33.3% 6.1% 6.1% 1.2 +3 2.84
RP MLB Percentile 0 89 3 100 83 83 19 46 32 84
RP MLB AVG 778 4.94 46.0% 17.3% 36.7% 9.3% 4.7% 0.7 0 3.53
Career 33 5.12 39.4% 27.3% 33.3% 6.1% 6.1% 1.2 +3 2.84
Get Premium