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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 4.2 0.00 1.93 22.7% 9.1%
109th 1
Sv
297th 12.0
IP
1st 5.12
ERA
286th 1.52
WHIP
161st 22.2%
K%
155th 10.7%
BB%
FB MPH SwStr% CSW% Str-ICR MTK% PLV PLA
93.8 8.0% 24.0% 47.0% 4.0% 5.00 4.09
134th 94.0
FB MPH
299th 11.9%
SwStr%
309th 28.4%
CSW%
259th 49.8%
Str-ICR
177th 4.3%
MTK%
148th 4.96
PLV
265th 3.69
PLA

Articles

4/30/2026Fantasy Baseball Relief Pitcher Roundup: 4/29Rick Graham

4/26/2026Fantasy Baseball Relief Pitcher Roundup: 4/25Rick Graham

4/23/2026Fantasy Baseball Relief Pitcher Roundup: 4/22Rick Graham

4/20/2026Fantasy Baseball Relief Pitcher Roundup: 4/19Rick Graham

10/22/2025Top 200 Starting Pitchers For Fantasy Baseball 2026Nick Pollack

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 4 0 4.2 0-0 0 0 0.00 1.93 3.99 2.19 3.82 4.09 22.7% 9.1% 13.5 0.00 .467 0.0% 100.0% 46.7% 33.3% 8.0% 24.0% 0.40 5.00
RP MLB Percentile 14 0 15 0-50 0 0 96 19 55 91 65 25 54 56 10 73 7 73 94 16 19 15 12 26 56
RP MLB AVG 10 0 12.0 1-1 1 2 5.12 1.52 4.69 4.70 4.54 3.69 22.2% 10.7% 9.2 1.22 .304 18.6% 71.2% 38.3% 43.5% 11.9% 28.4% 0.49 4.96
Career 14 8 45.0 1-5 0 0 5.80 1.67 5.56 5.27 4.79 3.88 19.5% 8.1% 11.6 1.80 .353 22.5% 71.9% 42.3% 36.2% 8.1% 25.6% 0.47 4.95

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 4 0 4.2 0-0 0 0 0 100 61 39 22 7 6 1 0 0 5 2 0 0
RP MLB Percentile 14 0 15 0-50 0 0 0 18 17 80 14 70 55 61 16 73 15 82 45 38
RP MLB AVG 10 0 12.0 1-1 0 1 2 223 141 82 57 12 8 2 0 2 13 6 1 1
Career 14 8 45.0 1-5 0 0 0 837 552 285 210 58 36 12 1 9 41 17 3 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 22.7% 9.1% .350 .400 .809 .368 .467 .467 .291 .317 .388 .370 88.2 85.7 19.3 3.99
RP MLB Percentile 54 56 10 42 32 29 7 9 17 55 6 47 49 78 21 55
RP MLB AVG 22.2% 10.7% .251 .407 .746 .332 .304 .334 .242 .331 .288 .377 88.2 89.5 13.3 4.69
Career 19.5% 8.1% .309 .527 .900 .394 .353 .392 .272 .372 .297 .427 89.2 92.3 18.2 5.56

Mason Black 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 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 11.0% (94.1) 28.0% (93.8) 10.0% (89.7) 8.0% (83.5) 34.0% (81.7) - 9.0% (88.0) - - 39.0% 61.0%
RP MLB Percentile 12 (43) 60 (44) 21 (52) 10 (15) 75 (40) - 22 (71) - - 25.5% 73.9%
RP MLB AVG 34.9% (94.0) 27.1% (93.9) 21.1% (89.2) 27.1% (85.6) 23.2% (82.5) 17.8% (80.8) 18.5% (86.1) 19.2% (86.3) 42.4% (55.9) 47.4% 52.4%
Career 30.6% (92.5) 27.4% (92.8) 1.8% (90.1) 10.3% (87.5) 26.9% (87.5) - 3.1% (87.7) - - 57.9% 42.1%

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 9.1% (0) 25.0% (2) 20.0% (1) 37.5% (1) 23.5% (2) - 33.3% (2) - - 20.5% 26.2%
RP MLB Percentile 4 (89) 33 (55) 15 (75) 78 (80) 33 (76) - 89 (63) - - 10.8% 33.7%
RP MLB AVG 26.3% (7) 28.3% (4) 28.5% (5) 30.3% (8) 28.2% (7) 27.5% (5) 21.8% (6) 25.7% (8) 20.0% (1) 27.9% 28.4%
Career 25.0% (29) 26.6% (9) 20.0% (2) 25.6% (8) 26.2% (18) - 19.2% (2) - - 25.8% 25.3%

Mason Black 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
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 33.3% 26.7% 20.0% 20.0% 46.7% 20.0% 40.0% 40.0% 22.0% 53.3% 26.7% 6.7% 13.3% 46.7%
RP MLB Percentile 19 26 30 90 9 1 76 96 92 17 39 37 13 16
RP MLB AVG 43.5% 21.9% 24.4% 10.2% 34.9% 41.9% 33.3% 24.7% 17.4% 61.5% 24.7% 6.1% 7.8% 38.3%
Career 36.2% 22.1% 26.8% 14.8% 38.9% 40.3% 36.9% 22.8% 22.6% 57.7% 24.8% 7.4% 10.1% 42.3%

Mason Black 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 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 .350 .368 .467 .467 .291 .317 .388 .370 88.2 85.7 19.3 0.0% 46.7% 31.8%
RP MLB Percentile 10 29 7 9 17 55 6 47 49 78 21 73 16 11
RP MLB AVG .251 .332 .304 .334 .242 .331 .288 .377 88.2 89.5 13.3 18.6% 38.3% 25.2%
Career .309 .394 .353 .392 .272 .372 .297 .427 89.2 92.3 18.2 22.5% 42.3% 30.0%

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 41.0% 61.0% 45.0% 27.1% 17.8% 22.0% 82.2% 86.2% 75.0% 16.0% 8.0% 24.0% 15.0% 54.0% 0.40 47.0%
RP MLB Percentile 24 31 38 27 16 92 16 37 10 41 15 12 21 18 26 26
RP MLB AVG 44.0% 62.9% 46.3% 30.7% 25.5% 17.4% 74.5% 83.8% 59.2% 16.6% 11.9% 28.4% 17.0% 57.3% 0.49 49.8%
Career 47.1% 65.9% 48.5% 30.2% 16.7% 22.6% 83.3% 88.2% 73.1% 17.4% 8.1% 25.6% 17.8% 59.0% 0.47 50.9%

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 41.0% 35.0% 31.0% 34.0% 46.0% 21.0% 33.0% 37.0% 32.0% 5.0%
RP MLB Percentile 24 52 15 27 86 64 16 87 6 25
RP MLB AVG 44.0% 35.2% 26.6% 38.3% 36.1% 22.7% 41.2% 30.6% 42.8% 6.3%
Career 47.1% 28.3% 26.6% 45.0% 47.4% 24.3% 28.3% 29.6% 43.7% 6.2%

Mason Black 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 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 52.0% 16.0% 32.0% 13.5% 54.5% 50.0% 19.2% 28.1% 15.6%
RP MLB Percentile 3 18 74 46 25 49 35 60 27
RP MLB AVG 58.6% 13.0% 29.1% 14.1% 59.5% 49.3% 21.0% 26.3% 19.6%
Career 56.2% 11.5% 32.4% 14.7% 57.1% 48.1% 23.0% 26.9% 15.1%

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 100 5.00 44.0% 19.0% 37.0% 7.0% 4.0% 1.4 +1 4.09
RP MLB Percentile 18 56 32 66 44 44 47 48 48 25
RP MLB AVG 223 4.96 46.1% 17.7% 36.2% 9.9% 4.3% 1.8 +2 3.69
Career 837 4.95 45.9% 15.8% 38.4% 7.5% 6.8% 16.9 +15 3.88
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