2025 Stats
W-L
0-0
ERA
6.75
WHIP
1.25
K
5
SV
0
2026 Projections
2025 Fantasy Outlook
Black went from being a top 15 prospect in the San Francisco organization to being designated for assignment and eventually traded to Kansas City in 2025. Black made just one appearance with the Giants big league club in 2025 allowing 5 runs in a start just before the break. He spent the rest of the season in Triple-A where he struck out nearly a batter an inning, but struggled with too many walks and homers in an unforgiving Pacific Coast League. Black might find more success in the Kansas City pen as a long man or working in Omaha in a role similar to the one Noah Cameron had to start 2025. He might be best working in long relief as his overall stuff is fringy for a starter, but Kansas City seems to get the most out of these types year in and year out. After all, that Bubic breakout came out of left field so at least mull that over if Black is available in AL-Only reserves or in the latter rounds of the draft-and-hold leagues. Read Past Outlooks
Signed a one-year contract with the Giants in March of 2025. Traded to the Royals in November of 2025.
Dealt to Kansas City
The Royals acquired Black from the Giants on Tuesday in exchange for Logan Martin.
Analysis
Black had been designated for assignment by the Giants last week and will now join the Royals' 40-man roster. The 25-year-old spent most of this season at Triple-A Sacramento, where he held a 5.81 ERA and 1.48 WHIP alongside a 114:62 K:BB over 119.1 innings. Black has been used mostly as a starting pitcher to this point in his pro career, though it's not known whether the Royals intend to keep him in that role. The righty has minor-league options remaining.
Black had been designated for assignment by the Giants last week and will now join the Royals' 40-man roster. The 25-year-old spent most of this season at Triple-A Sacramento, where he held a 5.81 ERA and 1.48 WHIP alongside a 114:62 K:BB over 119.1 innings. Black has been used mostly as a starting pitcher to this point in his pro career, though it's not known whether the Royals intend to keep him in that role. The righty has minor-league options remaining.
Pitching Stats
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2025 MLB Game Log
2025
2024
Minor League Game Log
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Pitching Appearances Breakdown
Average Pitch Count
74
Last 10 Games
74
Last 5 Games
74
How many pitches does Mason Black generally throw?
1-10
11-20
21-30
31-40
41-50
51-60
61-70
71-80
81-90
91-100
101-110
111-120
121+
What part of the game does Mason Black generally pitch?
1st
2nd
3rd
4th
5th
6th
7th
8th
9th
Extra
% Games Reaching Innings Threshold
% Games By Number of Innings Pitched
Left/Right Pitching Splits
Since 2023
-15%
BAA vs LHP
2025
-13%
BAA vs RHP
| BAA | K | BB | H | HR | ||||
|---|---|---|---|---|---|---|---|---|
| Since 2023vs Left | .276 | 16 | 7 | 21 | 4 | |||
| Since 2023vs Right | .326 | 20 | 8 | 30 | 5 | |||
| 2025vs Left | .286 | 3 | 0 | 2 | 1 | |||
| 2025vs Right | .250 | 2 | 0 | 3 | 1 | |||
| 2024vs Left | .275 | 13 | 7 | 19 | 3 | |||
| 2024vs Right | .338 | 18 | 8 | 27 | 4 | |||
| 2023vs Left | 0 | 0 | 0 | 0 | 0 | |||
| 2023vs Right | 0 | 0 | 0 | 0 | 0 | |||
| More Splits→ | View More Split Stats | |||||||
Home/Away Pitching Splits
Since 2023
-34%
ERA at Home
2025
-100%
ERA at Home
| ERA | WHIP | IP | K/9 | BB/9 | |||||
|---|---|---|---|---|---|---|---|---|---|
| Since 2023Home | 4.96 | 1.41 | 16.1 | 6.6 | 1.7 | ||||
| Since 2023Away | 7.50 | 1.79 | 24.0 | 9.0 | 4.5 | ||||
| 2025Home | 0 | 0 | 0 | 0 | 0 | ||||
| 2025Away | 6.75 | 1.25 | 4.0 | 11.3 | 0.0 | ||||
| 2024Home | 4.96 | 1.41 | 16.1 | 6.6 | 1.7 | ||||
| 2024Away | 7.65 | 1.90 | 20.0 | 8.6 | 5.4 | ||||
| 2023Home | 0 | 0 | 0 | 0 | 0 | ||||
| 2023Away | 0 | 0 | 0 | 0 | 0 | ||||
| More Splits→ | View More Split Stats | ||||||||
Stat Review
How does Mason Black compare to other relievers?
This section compares his stats with all relief pitcher seasons from the previous three seasons (minimum 30 innings)*. The bar represents the player's percentile rank. For example, if the bar is halfway across, then the player falls into the 50th percentile for that stat and it would be considered average.
* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
K/BB
0.00K/9
11.3BB/9
0.0HR/9
4.5Fastball
92.7 mphERA
6.75WHIP
1.25BABIP
.323GB/FB
0.71Left On Base
0.0%Exit Velocity
79.9 mphBarrels/BBE
6.3%Spin Rate
2234 rpmBalls Hit 95+ MPH
25.0%Swinging Strike
8.1%Prospect Rankings History
Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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2024 Fantasy Outlook
A sinker/slider righty whose shallow arsenal may limit his upside, Black is knocking on the door of the majors after making 13 starts at Triple-A. The 6-foot-3, 230-pound burgeoning workhorse built up to 123.2 innings while striking out 155 and walking 52. His 94-mph sinker can touch 97 mph and his slider sits in the mid-80s. Black has dabbled with a curveball, cutter and changeup, but he is mostly a two-pitch pitcher. Generally sinker/slider types generate groundballs at high clips, but Black had a 41.7 percent groundball rate at Double-A and a 39.9 percent groundball rate at Triple-A. Fortunately, Oracle Park ranks 27th in Statcast's home run park factor, so a flyball approach isn't the worst thing. Black could be a useful streamer in favorable home starts as a rookie, but he projects as a No. 4 or No. 5 starter long term.
More Fantasy News
Dropped from 40-man
The Giants designated Black for assignment Thursday.
Analysis
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Demoted to Sacramento
The Giants optioned Black to Triple-A Sacramento on Saturday.
Analysis
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Struggles in season debut
Black threw four relief innings in Friday's 11-2 loss to the Athletics, allowing five runs (three earned) on five hits -- including two home runs -- while striking out five.
Analysis
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Joining big-league squad
The Giants recalled Black from Triple-A Sacramento on Wednesday, Justice delos Santos of The San Jose Mercury News reports.
Analysis
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Sent to Triple-A
The Giants optioned Black to Triple-A Sacramento on Wednesday, Susan Slusser of the San Francisco Chronicle reports.
Analysis
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Latest Fantasy Rumors
Might be rotation option soon
Alex Pavlovic of NBC Sports Bay Area suggests that Black could be an option for San Francisco's rotation in the near future in the wake of Blake Snell's adductor strain.
Analysis
Black missed out on the Giants' season-opening rotation but has a 1.53 ERA, 0.99 WHIP and 20:4 K:BB through four starts at Triple-A Sacramento, which could earn him a promotion soon. San Francisco doesn't necessarily need reinforcements immediately with scheduled off days Thursday and Monday, but a stretch of 16 straight games follows that and will require a full rotation. Snell seems likely to miss more than the 15-day minimum, which could set up Black to make his MLB debut in early May if San Francisco is willing to add him to the 40-man roster.
Black missed out on the Giants' season-opening rotation but has a 1.53 ERA, 0.99 WHIP and 20:4 K:BB through four starts at Triple-A Sacramento, which could earn him a promotion soon. San Francisco doesn't necessarily need reinforcements immediately with scheduled off days Thursday and Monday, but a stretch of 16 straight games follows that and will require a full rotation. Snell seems likely to miss more than the 15-day minimum, which could set up Black to make his MLB debut in early May if San Francisco is willing to add him to the 40-man roster.