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Jack Ralston

#79 - Relief Pitcher

Miami Marlins

Bats / Throws Right / Right
Date of Birth 8/13/1997 (29)
Height, Weight 6'6", 231 lb
Hometown Panorama City, CA

2026 Season Stats

Needs more playing time to qualify
MLB Rank MLB Average
Sv IP ERA WHIP K% BB%
0 17.1 5.71 1.38 24.7% 11.7%
221st 3
Sv
346th 52.0
IP
300th 4.21
ERA
208th 1.34
WHIP
117th 22.6%
K%
256th 9.8%
BB%
FB MPH SwStr% CSW% Str-ICR MTK% PLV PLA
93.6 6.8% 30.9% 54.0% 7.1% 4.87 4.03
244th 94.7
FB MPH
346th 12.1%
SwStr%
61st 28.5%
CSW%
67th 51.2%
Str-ICR
330th 4.7%
MTK%
232nd 4.94
PLV
262nd 3.54
PLA

Articles

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9/17/2026Fantasy Baseball Relief Pitcher Roundup: 9/16Rick Graham

9/15/2026Fantasy Baseball Relief Pitcher Roundup: 9/14Rick Graham

See More Articles
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Jack Ralston 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 MIA 16 1 17.1 0-3 0 3 5.71 1.38 6.87 6.43 4.31 4.03 24.7% 11.7% 7.8 2.60 .238 41.7% 77.8% 27.1% 45.8% 6.8% 30.9% 0.56 4.87
RP MLB Percentile 7 65 1 0-31 0 37 15 39 1 5 43 25 66 27 54 2 87 1 72 97 60 1 82 68 29
RP MLB AVG 42 2 52.0 3-3 3 7 4.21 1.34 4.17 4.18 4.25 3.54 22.6% 9.8% 8.3 1.09 .291 17.7% 72.4% 36.8% 44.1% 12.1% 28.5% 0.50 4.94
Career 16 1 17.1 0-3 0 3 5.71 1.38 6.87 6.38 4.29 4.03 24.7% 11.7% 7.8 2.60 .238 41.7% 77.8% 27.1% 45.8% 6.8% 30.9% 0.56 4.87

Jack Ralston Repertoire

2026 All
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Jack Ralston Game Log

Jack Ralston Standard

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Year Team G GS IP W-L QS Sv Hld P Strikes Balls TBF H 1B 2B 3B HR K BB HB WP
2026 MIA 16 1 17.1 0-3 0 0 3 311 194 117 77 15 7 2 1 5 19 9 1 2
RP MLB Percentile 7 65 1 0-31 0 0 37 2 1 97 0 97 99 92 21 46 9 88 64 32
RP MLB AVG 42 2 52.0 3-3 0 3 7 880 563 318 226 48 32 9 1 6 51 21 3 2
Career 16 1 17.1 0-3 0 0 3 311 194 117 77 15 7 2 1 5 19 9 1 2

Jack Ralston Advanced

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Year Team K% BB% AVG SLG OPS wOBA BABIP BACON xAVG xwOBA xBABIP xwoBACON EV FB EV LA xERA
2026 MIA 24.7% 11.7% .231 .523 .852 .359 .238 .319 .265 .405 .267 .501 84.4 85.6 10.6 6.87
RP MLB Percentile 66 27 57 7 12 16 87 50 18 1 67 0 93 91 70 1
RP MLB AVG 22.6% 9.8% .241 .390 .713 .315 .291 .321 .235 .315 .280 .358 87.6 89.3 13.0 4.17
Career 24.7% 11.7% .231 .523 .852 .359 .238 .319 .265 .405 .267 .501 84.4 85.6 10.6 6.87

Jack Ralston Pitch › Mix

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Year Team FF% (MPH) SI% (MPH) FC% (MPH) SL% (MPH) ST% (MPH) CB% (MPH) CH% (MPH) FS% (MPH) KN% (MPH) Fastball% Secondary%
2026 MIA26.4% (93.6)--22.5% (85.4)---51.1% (82.5)- 26.4% 73.6%
RP MLB Percentile 22 (29) - - 45 (31) - - - 97 (8) - 4.0% 95.5%
RP MLB AVG 38.8% (94.7) 26.8% (94.1) 19.6% (89.4) 25.6% (86.1) 20.7% (82.4) 15.3% (80.3) 17.6% (86.1) 19.1% (86.6) 42.7% (61.5) 48.7% 51.2%
Career26.4% (93.6)--22.5% (85.4)---51.1% (82.5)- 26.4% 73.6%

Jack Ralston Pitch › Results

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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 MIA34.1% (5)--30.0% (1)---29.6% (15)- 34.1% 29.7%
RP MLB Percentile 95 (95) - - 52 (96) - - - 81 (35) - 94.6% 58.8%
RP MLB AVG 27.2% (32) 27.6% (13) 26.8% (15) 29.5% (28) 28.4% (20) 27.3% (15) 22.3% (21) 22.8% (21) 19.3% (9) 27.9% 28.8%
Career34.1% (5)--30.0% (1)---29.6% (15)- 34.1% 29.7%

Jack Ralston Batted Ball › Contact

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Year Team GB% LD% FB% PU% SS% Pull% Cent% Oppo% Foul Str% PC% Fl&B% Solid% Brl% ICR%
2026 MIA 45.8% 16.7% 25.0% 12.5% 27.1% 54.2% 25.0% 20.8% 16.1% 72.9% 10.4% 2.1% 14.6% 27.1%
RP MLB Percentile 60 88 57 73 93 99 1 15 19 97 100 95 1 97
RP MLB AVG 44.1% 21.6% 24.1% 10.2% 34.6% 41.0% 33.7% 25.4% 18.2% 63.0% 24.5% 5.8% 6.8% 36.8%
Career 45.8% 16.7% 25.0% 12.5% 27.1% 54.2% 25.0% 20.8% 16.1% 72.9% 10.4% 2.1% 14.6% 27.1%

Jack Ralston Batted Ball › Outcomes

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Year Team AVG wOBA BABIP BACON xAVG xwOBA xBABIP xwoBACON EV FB EV LA HR/FB ICR% IPA%
2026 MIA .231 .359 .238 .319 .265 .405 .267 .501 84.4 85.6 10.6 41.7% 27.1% 16.9%
RP MLB Percentile 57 16 87 50 18 1 67 0 93 91 70 1 97 95
RP MLB AVG .241 .315 .291 .321 .235 .315 .280 .358 87.6 89.3 13.0 17.7% 36.8% 24.4%
Career .231 .359 .238 .319 .265 .405 .267 .501 84.4 85.6 10.6 41.7% 27.1% 16.9%

Jack Ralston Approach › Plate Discipline

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Year Team Zone% Str% Swing% O-Sw% Whiff% Foul Str% Con% Z-Con% O-Con% CS% SwStr% CSW% BIP% PLUS% IPR% Str-ICR
2026 MIA 46.0% 62.4% 38.3% 18.5% 17.6% 16.1% 82.4% 84.1% 77.4% 24.1% 6.8% 30.9% 15.4% 57.6% 0.56 54.0%
RP MLB Percentile 71 30 0 0 5 19 5 54 1 99 1 82 21 39 68 80
RP MLB AVG 44.5% 63.8% 47.4% 31.7% 25.5% 18.2% 74.5% 84.0% 58.6% 16.4% 12.1% 28.5% 17.1% 58.3% 0.50 51.2%
Career 46.0% 62.4% 38.3% 18.5% 17.6% 16.1% 82.4% 84.1% 77.4% 24.1% 6.8% 30.9% 15.4% 57.6% 0.56 54.0%

Jack Ralston Approach › Locations

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Year Team Zone% aLoc% x-mLoc% gLoc% hiLoc% y-mLoc% loLoc% iLoc% oLoc% mmLoc%
2026 MIA 46.0% 33.1% 36.7% 30.2% 40.2% 20.3% 39.5% 26.7% 36.7% 7.7%
RP MLB Percentile 71 40 0 10 71 82 42 21 11 84
RP MLB AVG 44.5% 34.6% 27.0% 38.4% 36.2% 22.9% 40.9% 29.9% 43.1% 6.6%
Career 46.0% 33.1% 36.7% 30.2% 40.2% 20.3% 39.5% 26.7% 36.7% 7.7%

Jack Ralston Approach › Counts

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Year Team Early% Behind% 2-Str% Early BIP% F-Str% TF-Str% ECS% 2-Str O-Sw% PAR%
2026 MIA 58.5% 12.5% 29.3% 10.4% 52.6% 51.3% 31.3% 18.7% 20.9%
RP MLB Percentile 48 40 39 5 4 56 99 1 67
RP MLB AVG 58.5% 12.1% 29.9% 14.6% 61.1% 50.2% 21.1% 26.7% 19.3%
Career 58.5% 12.5% 29.3% 10.4% 52.6% 51.3% 31.3% 18.7% 20.9%

Jack Ralston PLV

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team P PLV QP% AP% BP% Q-BP% MTK% HP HL PLA
2026 MIA 311 4.87 44.4% 16.1% 39.5% 4.8% 7.1% 3.1 -3 4.03
RP MLB Percentile 2 29 32 28 19 19 6 36 63 25
RP MLB AVG 880 4.94 45.9% 17.4% 36.7% 9.2% 4.7% 0.7 0 3.54
Career 311 4.87 44.4% 16.1% 39.5% 4.8% 7.1% 3.1 -3 4.03
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