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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 3.2 0.00 2.18 27.8% 11.1%
91st 1
Sv
312th 9.0
IP
1st 5.72
ERA
306th 1.60
WHIP
162nd 22.0%
K%
276th 11.3%
BB%
FB MPH SwStr% CSW% Str-ICR MTK% PLV PLA
93.9 7.5% 27.5% 42.5% 3.8% 5.01 4.22
115th 94.2
FB MPH
316th 11.9%
SwStr%
297th 28.4%
CSW%
313th 49.6%
Str-ICR
37th 4.2%
MTK%
76th 4.96
PLV
244th 3.75
PLA

Articles

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

7/28/2025Expected SP Schedules Weeks 18-19: What's That Snell?Patrick Fitzgerald

7/27/2025Starting Pitcher Streamer Rankings Fantasy Baseball: 7/27 & 7/28 & 7/29Nick 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 3 0 3.2 0-0 0 0 0.00 2.18 4.85 1.88 2.59 4.22 27.8% 11.1% 14.7 0.00 .545 0.0% 100.0% 63.6% 36.4% 7.5% 27.5% 0.48 5.01
RP MLB Percentile 9 0 9 0-38 0 0 92 12 45 69 54 30 53 20 12 64 6 67 89 11 31 9 14 18 77
RP MLB AVG 7 0 9.0 0-1 1 1 5.72 1.60 4.89 5.34 4.80 3.75 22.0% 11.3% 9.5 1.29 .308 19.1% 71.6% 38.5% 43.3% 11.9% 28.4% 0.48 4.96
Career 13 8 44.0 1-5 0 0 5.93 1.68 5.67 5.32 4.72 3.89 19.9% 8.3% 11.7 1.84 .356 23.7% 71.4% 43.4% 36.6% 8.1% 25.9% 0.48 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 3 0 3.2 0-0 0 0 0 80 48 32 18 6 5 1 0 0 5 2 0 0
RP MLB Percentile 9 0 9 0-38 0 0 0 14 13 82 10 77 67 45 11 64 12 70 38 34
RP MLB AVG 7 0 9.0 0-1 0 1 1 169 107 63 43 9 6 2 0 1 10 5 1 1
Career 13 8 44.0 1-5 0 0 0 817 539 278 206 57 35 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 27.8% 11.1% .375 .438 .882 .401 .545 .545 .315 .349 .458 .442 94.4 99.9 20.6 4.85
RP MLB Percentile 53 20 11 32 21 18 6 7 28 45 12 46 9 7 15 45
RP MLB AVG 22.0% 11.3% .257 .415 .761 .338 .308 .339 .248 .337 .293 .382 88.4 89.6 13.4 4.89
Career 19.9% 8.3% .310 .533 .909 .398 .356 .396 .273 .377 .300 .434 89.7 93.0 18.3 5.67

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 8.8% (93.9) 31.3% (93.9) 11.3% (89.7) 3.8% (87.0) 35.0% (81.6) - 10.0% (88.0) - - 40.0% 60.0%
RP MLB Percentile 7 (38) 68 (47) 23 (55) 2 (63) 81 (39) - 21 (68) - - 22.5% 77.2%
RP MLB AVG 34.7% (94.2) 26.8% (93.8) 21.2% (89.2) 27.9% (85.5) 23.2% (82.5) 18.1% (80.8) 19.1% (86.0) 19.9% (86.5) - (-) 47.3% 52.6%
Career 30.8% (92.5) 27.7% (92.8) 1.7% (90.1) 9.9% (87.9) 26.8% (87.9) - 3.1% (87.6) - - 58.5% 41.5%

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 14.3% (0) 28.0% (2) 22.2% (1) 0.0% (0) 32.1% (1) - 37.5% (2) - - 25.0% 29.2%
RP MLB Percentile 7 (88) 50 (45) 24 (73) 0 (0) 63 (82) - 92 (58) - - 16.2% 33.1%
RP MLB AVG 26.5% (6) 27.9% (3) 28.0% (4) 31.0% (6) 28.7% (6) 28.0% (4) 22.4% (5) 25.0% (7) - (-) 27.9% 28.4%
Career 25.4% (29) 27.0% (9) 21.4% (2) 23.5% (7) 27.4% (17) - 20.0% (2) - - 26.2% 25.7%

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 36.4% 36.4% 9.1% 18.2% 54.5% 18.2% 45.5% 36.4% 18.8% 36.4% 36.4% 9.1% 18.2% 63.6%
RP MLB Percentile 31 30 13 94 36 1 92 89 56 11 43 11 20 11
RP MLB AVG 43.3% 22.1% 24.5% 10.1% 35.4% 41.6% 33.6% 24.8% 17.3% 61.3% 25.0% 5.9% 7.9% 38.5%
Career 36.6% 22.8% 26.2% 14.5% 39.3% 40.7% 37.2% 22.1% 22.3% 56.5% 25.5% 7.6% 10.3% 43.4%

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 .375 .401 .545 .545 .315 .349 .458 .442 94.4 99.9 20.6 0.0% 63.6% 38.9%
RP MLB Percentile 11 18 6 7 28 45 12 46 9 7 15 67 11 18
RP MLB AVG .257 .338 .308 .339 .248 .337 .293 .382 88.4 89.6 13.4 19.1% 38.5% 25.1%
Career .310 .398 .356 .396 .273 .377 .300 .434 89.7 93.0 18.3 23.7% 43.4% 30.6%

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 41.3% 60.0% 40.0% 23.4% 18.8% 18.8% 81.3% 85.7% 72.7% 20.0% 7.5% 27.5% 13.8% 52.5% 0.48 42.5%
RP MLB Percentile 35 9 7 3 16 56 16 26 25 64 9 14 11 7 18 11
RP MLB AVG 43.9% 62.6% 46.1% 30.3% 25.6% 17.3% 74.4% 83.8% 58.4% 16.5% 11.9% 28.4% 16.8% 57.0% 0.48 49.6%
Career 47.2% 66.0% 48.1% 29.9% 16.8% 22.3% 83.2% 88.3% 72.9% 17.9% 8.1% 25.9% 17.7% 59.0% 0.48 50.6%

Mason Black 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 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 41.3% 37.5% 31.3% 31.3% 46.3% 25.0% 28.8% 36.3% 32.5% 6.3%
RP MLB Percentile 35 67 37 28 80 47 18 79 17 9
RP MLB AVG 43.9% 34.8% 26.4% 38.8% 36.2% 22.7% 41.0% 30.3% 43.4% 6.3%
Career 47.2% 28.4% 26.6% 45.0% 47.5% 24.7% 27.8% 29.4% 44.1% 6.4%

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 53.8% 16.3% 30.0% 16.3% 50.0% 44.4% 23.3% 25.0% 20.8%
RP MLB Percentile 8 8 36 36 4 11 29 4 42
RP MLB AVG 58.5% 13.1% 29.0% 13.7% 59.5% 49.7% 21.1% 26.3% 19.6%
Career 56.4% 11.4% 32.2% 15.0% 56.8% 47.6% 23.4% 26.6% 15.6%

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 80 5.01 47.5% 18.8% 33.8% 13.8% 3.8% 1.7 +2 4.22
RP MLB Percentile 14 77 86 25 65 65 87 40 52 30
RP MLB AVG 169 4.96 45.8% 17.9% 36.3% 9.5% 4.2% 1.5 +1 3.75
Career 817 4.95 46.3% 15.7% 38.1% 8.2% 6.9% 17.2 +15 3.89
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