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Mason Black

#47 - Relief Pitcher

Kansas City Royals

Bats / Throws Right / Right
Date of Birth 12/10/1999 (26)
Height, Weight 6'3", 228 lb
Hometown Scranton, PA

2026 Season Stats

MLB Rank MLB Average
Sv IP ERA WHIP K% BB%
0 17.2 3.57 1.70 18.3% 13.4%
164th 2
Sv
273rd 26.0
IP
81st 4.46
ERA
268th 1.40
WHIP
189th 22.1%
K%
273rd 10.3%
BB%
FB MPH SwStr% CSW% Str-ICR MTK% PLV PLA
94.1 9.9% 28.2% 44.7% 5.4% 4.94 3.98
163rd 94.4
FB MPH
259th 12.0%
SwStr%
169th 28.5%
CSW%
297th 50.5%
Str-ICR
261st 4.6%
MTK%
171st 4.93
PLV
244th 3.54
PLA

Articles

6/16/2026Fantasy Baseball Relief Pitcher Roundup: 6/15Rick Graham

6/13/2026Fantasy Baseball Relief Pitcher Roundup: 6/12Rick Graham

6/11/2026Fantasy Baseball Relief Pitcher Roundup: 6/10Rick Graham

6/2/2026Fantasy Baseball Relief Pitcher Roundup: 6/1Rick Graham

6/1/2026Fantasy Baseball Relief Pitcher Roundup: 5/31Rick Graham

See More Articles
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Mason Black 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 SF 9 8 36.1 1-5 0 0 6.44 1.68 5.76 5.47 5.05 3.87 18.3% 8.9% 11.4 1.73 .348 21.9% 70.1% 42.5% 35.8% 7.8% 25.9% 0.48 4.94
2025 SF 1 0 4.0 0-0 0 0 6.75 1.25 5.54 7.14 3.69 3.68 26.3% 0.0% 11.3 4.50 .250 40.0% 0.0% 35.7% 42.9% 10.8% 24.3% 0.54 4.96
2026 KC 12 0 17.2 0-0 0 0 3.57 1.70 5.62 5.89 5.71 3.98 18.3% 13.4% 9.7 1.53 .314 20.0% 89.9% 50.0% 31.5% 9.9% 28.2% 0.46 4.94
RP MLB Percentile 20 0 22 0-68 0 0 76 23 14 13 15 30 46 22 33 18 36 33 98 2 6 25 51 52 50
RP MLB AVG 20 1 26.0 1-1 2 3 4.46 1.40 4.39 4.40 4.42 3.54 22.1% 10.3% 8.5 1.14 .293 18.3% 72.3% 37.4% 43.6% 12.0% 28.5% 0.49 4.93
Career 22 8 58.0 1-5 0 0 5.59 1.66 5.71 5.68 5.13 3.89 18.9% 9.6% 10.9 1.86 .331 23.1% 74.8% 44.1% 35.1% 8.7% 26.5% 0.48 4.94

Mason Black Repertoire

2024 2025 2026 All
Hide MLB Percentile | Hide MLB Average

Mason Black Game Log

Mason Black 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 SF 9 8 36.1 1-5 0 0 0 663 438 225 169 46 29 10 0 7 31 15 3 0
2025 SF 1 0 4.0 0-0 0 0 0 74 53 21 19 5 1 1 1 2 5 0 0 0
2026 KC 12 0 17.2 0-0 0 0 0 333 203 130 82 19 14 2 0 3 15 11 2 0
RP MLB Percentile 20 0 22 0-68 0 0 0 26 26 70 23 68 57 83 32 32 24 53 19 57
RP MLB AVG 20 1 26.0 1-1 0 2 3 440 279 161 113 24 16 5 0 3 25 11 1 1
Career 22 8 58.0 1-5 0 0 0 1,070 694 376 270 70 44 13 1 12 51 26 5 0

Mason Black 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 SF 18.3% 8.9% .309 .517 .898 .387 .348 .387 .272 .372 .294 .416 89.4 91.5 18.0 5.76
2025 SF 26.3% 0.0% .263 .737 1.000 .410 .250 .357 .247 .368 .211 .499 88.6 100.9 18.8 5.54
2026 KC 18.3% 13.4% .279 .441 .831 .370 .314 .352 .272 .373 .301 .396 92.6 90.2 21.5 5.62
RP MLB Percentile 46 22 31 31 26 22 36 28 18 14 18 13 4 30 5 14
RP MLB AVG 22.1% 10.3% .245 .397 .727 .322 .293 .324 .239 .323 .283 .365 87.8 89.4 13.2 4.39
Career 18.9% 9.6% .297 .513 .888 .386 .331 .374 .270 .374 .291 .419 90.3 92.0 19.1 5.71

Mason Black 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%
2024 SF 32.1% (92.4) 28.5% (92.6) - 11.8% (87.9) 25.3% (81.2) - 2.3% (87.6) - - 60.6% 39.4%
2025 SF 43.2% (92.7) 16.2% (92.5) 6.8% (90.7) - 31.1% (81.8) - 2.7% (86.9) - - 59.5% 40.5%
2026 KC 22.2% (94.2) 26.4% (94.1) 7.5% (90.7) 12.3% (86.8) 23.7% (83.0) 3.0% (81.0) 4.8% (88.3) - - 48.6% 51.4%
RP MLB Percentile 18 (43) 60 (50) 14 (65) 18 (58) 61 (56) 7 (51) 11 (71) - - 37.8% 62.2%
RP MLB AVG 37.2% (94.4) 25.5% (94.0) 21.5% (89.3) 26.0% (85.3) 21.5% (82.6) 17.5% (79.7) 18.1% (86.2) 19.8% (86.5) 31.8% (68.1) 47.8% 52.0%
Career 29.8% (92.9) 27.0% (93.1) 2.8% (90.7) 11.1% (87.5) 25.2% (87.5) 0.9% (81.0) 3.1% (87.9) - - 56.8% 43.2%

Mason Black 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 SF 25.8% (26) 27.0% (7) - 24.4% (7) 26.8% (12) - 13.3% (0) - - 26.4% 25.3%
2025 SF 25.0% (3) 25.0% (0) 20.0% (1) - 26.1% (4) - 0.0% (0) - - 25.0% 23.3%
2026 KC 21.6% (7) 37.5% (10) 28.0% (3) 34.1% (5) 22.8% (6) 30.0% (0) 18.8% (2) - - 30.2% 26.3%
RP MLB Percentile 16 (62) 92 (20) 53 (65) 73 (60) 25 (57) 57 (78) 31 (69) - - 71.9% 34.4%
RP MLB AVG 27.0% (15) 27.2% (6) 27.0% (8) 29.6% (13) 28.2% (11) 27.1% (7) 21.8% (10) 24.5% (13) 23.3% (6) 27.6% 28.8%
Career 24.8% (36) 30.1% (17) 26.7% (4) 27.7% (12) 25.6% (22) 30.0% (0) 15.2% (2) - - 27.3% 25.5%

Mason Black 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 SF 35.8% 23.3% 26.7% 14.2% 38.3% 41.7% 37.5% 20.8% 22.0% 57.6% 26.7% 6.7% 9.2% 42.5%
2025 SF 42.9% 7.1% 35.7% 14.3% 35.7% 50.0% 28.6% 21.4% 28.4% 64.3% 7.1% 14.3% 14.3% 35.7%
2026 KC 31.5% 25.9% 27.8% 14.8% 40.7% 29.6% 40.7% 29.6% 16.5% 50.0% 31.5% 3.7% 14.8% 50.0%
RP MLB Percentile 6 29 85 87 17 13 64 84 53 3 20 64 2 2
RP MLB AVG 43.6% 22.0% 24.3% 10.3% 34.7% 41.4% 33.5% 25.1% 17.8% 62.3% 24.5% 5.9% 7.3% 37.4%
Career 35.1% 22.9% 27.7% 14.4% 38.8% 38.8% 37.8% 23.4% 20.7% 55.9% 26.6% 6.4% 11.2% 44.1%

Mason Black 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%
2024 SF .309 .387 .348 .387 .272 .372 .294 .416 89.4 91.5 18.0 21.9% 42.5% 30.2%
2025 SF .263 .410 .250 .357 .247 .368 .211 .499 88.6 100.9 18.8 40.0% 35.7% 26.3%
2026 KC .279 .370 .314 .352 .272 .373 .301 .396 92.6 90.2 21.5 20.0% 50.0% 32.9%
RP MLB Percentile 31 22 36 28 18 14 18 13 4 30 5 33 2 10
RP MLB AVG .245 .322 .293 .324 .239 .323 .283 .365 87.8 89.4 13.2 18.3% 37.4% 24.8%
Career .297 .386 .331 .374 .270 .374 .291 .419 90.3 92.0 19.1 23.1% 44.1% 30.7%

Mason Black 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
2024 SF 47.4% 66.1% 48.0% 30.1% 16.4% 22.0% 83.6% 88.7% 73.3% 18.1% 7.8% 25.9% 18.1% 59.1% 0.48 50.7%
2025 SF 52.7% 71.6% 58.1% 37.1% 18.6% 28.4% 81.4% 86.7% 69.2% 13.5% 10.8% 24.3% 18.9% 64.9% 0.54 58.1%
2026 KC 44.4% 61.0% 42.6% 25.9% 23.2% 16.5% 76.8% 85.1% 60.4% 18.3% 9.9% 28.2% 16.2% 55.3% 0.46 44.7%
RP MLB Percentile 48 30 17 16 35 53 35 39 40 78 25 51 24 30 52 14
RP MLB AVG 44.4% 63.3% 46.8% 31.1% 25.5% 17.8% 74.5% 83.9% 58.6% 16.5% 12.0% 28.5% 17.1% 57.8% 0.49 50.5%
Career 46.8% 64.9% 47.0% 29.2% 18.5% 20.7% 81.5% 87.5% 69.3% 17.9% 8.7% 26.5% 17.6% 58.3% 0.48 49.3%

Mason Black Approach › Locations

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Year Team Zone% aLoc% x-mLoc% gLoc% hiLoc% y-mLoc% loLoc% iLoc% oLoc% mmLoc%
2024 SF 47.4% 28.1% 24.9% 47.1% 46.6% 25.0% 28.4% 28.4% 46.8% 5.7%
2025 SF 52.7% 21.6% 36.5% 41.9% 56.8% 21.6% 21.6% 31.1% 32.4% 12.2%
2026 KC 44.4% 33.0% 27.9% 39.0% 47.1% 21.0% 31.8% 34.5% 37.5% 6.0%
RP MLB Percentile 48 44 34 47 94 79 11 87 10 38
RP MLB AVG 44.4% 34.7% 27.0% 38.4% 36.2% 22.9% 40.9% 30.1% 42.9% 6.5%
Career 46.8% 29.2% 26.6% 44.2% 47.5% 23.6% 29.0% 30.5% 42.9% 6.3%

Mason Black Approach › Counts

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Year Team Early% Behind% 2-Str% Early BIP% F-Str% TF-Str% ECS% 2-Str O-Sw% PAR%
2024 SF 56.3% 11.2% 32.6% 15.3% 56.2% 46.7% 24.1% 26.9% 14.4%
2025 SF 60.8% 8.1% 31.1% 11.1% 68.4% 57.9% 17.8% 26.1% 21.7%
2026 KC 53.5% 15.6% 30.9% 14.6% 58.5% 47.6% 22.5% 26.2% 14.6%
RP MLB Percentile 1 26 86 46 68 74 72 42 21
RP MLB AVG 58.5% 12.4% 29.6% 14.4% 60.3% 49.6% 21.2% 26.3% 19.1%
Career 55.7% 12.3% 32.0% 14.8% 57.8% 47.8% 23.2% 26.6% 14.9%

Mason Black PLV

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team P PLV QP% AP% BP% Q-BP% MTK% HP HL PLA
2024 SF 663 4.94 46.6% 14.9% 38.5% 8.1% 6.8% 13.6 +13 3.87
2025 SF 74 4.96 41.9% 18.9% 39.2% 2.7% 10.8% 1.9 +0 3.68
2026 KC 333 4.94 49.8% 13.8% 36.3% 13.5% 5.4% 5.1 +1 3.98
RP MLB Percentile 26 50 81 10 46 46 25 28 52 30
RP MLB AVG 440 4.93 45.9% 17.2% 36.9% 9.0% 4.6% 0.9 +0 3.54
Career 1,070 4.94 47.3% 14.9% 37.9% 9.4% 6.6% 20.6 +14 3.89
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