2025 Stats
W-L
0-0
ERA
0.00
WHIP
0.75
K
1
SV
0
Rest-of-Season Projections
Optioned to Triple-A
The Mariners optioned Diaz to Triple-A Tacoma on Wednesday.
ANALYSIS
Diaz made his one appearance for Seattle on Tuesday and allowed no runs on one hit with a strikeout in 1.1 innings. The southpaw has made the bulk of his appearances for Tacoma as a starter and figured to get a shot at securing a rotation spot in place of the injured George Kirby (shoulder), but he'll instead return to the minors after a relief appearance. Luis F. Castillo is expected to be promoted from Triple-A Tacoma to make his first career start Friday.
Diaz made his one appearance for Seattle on Tuesday and allowed no runs on one hit with a strikeout in 1.1 innings. The southpaw has made the bulk of his appearances for Tacoma as a starter and figured to get a shot at securing a rotation spot in place of the injured George Kirby (shoulder), but he'll instead return to the minors after a relief appearance. Luis F. Castillo is expected to be promoted from Triple-A Tacoma to make his first career start Friday.
Pitching Stats
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2025
2024
2023
2022
2021
Minor League Game Log
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Pitching Appearances Breakdown
Average Pitch Count
26
Last 10 Games
26
Last 5 Games
26
How many pitches does Jhonathan Diaz 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 Jhonathan Diaz 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
-25%
BAA vs LHP
2025
-100%
BAA vs RHP
| BAA | K | BB | H | HR | ||||
|---|---|---|---|---|---|---|---|---|
| Since 2023vs Left | .290 | 6 | 3 | 9 | 0 | |||
| Since 2023vs Right | .388 | 7 | 7 | 19 | 2 | |||
| 2025vs Left | .500 | 0 | 0 | 1 | 0 | |||
| 2025vs Right | .000 | 1 | 0 | 0 | 0 | |||
| 2024vs Left | .263 | 5 | 0 | 5 | 0 | |||
| 2024vs Right | .360 | 3 | 3 | 9 | 2 | |||
| 2023vs Left | .300 | 1 | 3 | 3 | 0 | |||
| 2023vs Right | .476 | 3 | 4 | 10 | 0 | |||
| More Splits→ | View More Split Stats | |||||||
Home/Away Pitching Splits
Since 2023
-83%
ERA on Road
2025
No Stats
| ERA | WHIP | IP | K/9 | BB/9 | |||||
|---|---|---|---|---|---|---|---|---|---|
| Since 2023Home | 9.00 | 2.42 | 12.0 | 5.3 | 4.5 | ||||
| Since 2023Away | 1.50 | 1.50 | 6.0 | 9.0 | 6.0 | ||||
| 2025Home | 0.00 | 0.75 | 1.1 | 6.8 | 0.0 | ||||
| 2025Away | 0 | 0 | 0 | 0 | 0 | ||||
| 2024Home | 5.19 | 1.85 | 8.2 | 6.2 | 3.1 | ||||
| 2024Away | 0.00 | 1.00 | 1.0 | 18.0 | 0.0 | ||||
| 2023Home | 31.50 | 6.00 | 2.0 | 0.0 | 13.5 | ||||
| 2023Away | 1.80 | 1.60 | 5.0 | 7.2 | 7.2 | ||||
| More Splits→ | View More Split Stats | ||||||||
Stat Review
How does Jhonathan Diaz 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
6.8BB/9
0.0HR/9
0.0Fastball
88.8 mphERA
0.00WHIP
0.75BABIP
.266GB/FB
0.50Left On Base
100.0%Exit Velocity
76.2 mphBarrels/BBE
0.0%Spin Rate
2497 rpmBalls Hit 95+ MPH
8.3%Swinging Strike
7.7%Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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2023 Fantasy Outlook
Diaz spent most of 2022 in Triple-A, where he posted a 4.98 ERA, 1.36 WHIP and 46:20 K:BB over 47 innings. For a second straight season, he got a brief taste of the big-leagues, hurling 15.1 innings over four outings (three starts) and recording a 2.93 ERA. While that number looks good on the surface, Diaz gave up four walks in each of his first two appearances and logged a troubling 11:10 K:BB overall. Diaz doesn't throw hard -- he averaged 91.4 mph on his fastball last year during his time in the majors -- but he throws five different pitches, using all but his curveball at least 16% of the time last season. The slider was clearly his best pitch, as he threw it 44 times to big-league hitters during the campaign without giving up a hit while posting a 40.6% whiff rate on the offering. The southpaw ended the campaign on the 60-day IL with an undisclosed injury, and Los Angeles designated him for assignment in November before re-signing him to a minor-league contract the following month. He'll likely open the 2023 campaign back at Triple-A but should see some time in the majors at some point during the season.
More Fantasy News
Called up from Triple-A
The Mariners selected Diaz 's contract from Triple-A Tacoma on Tuesday.
ANALYSIS
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Heading to minor-league camp
The Mariners reassigned Diaz to minor-league camp Monday.
ANALYSIS
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Joins camp as NRI
Diaz agreed Wednesday with the Mariners on a minor-league contract that includes an invitation to spring training, Ryan Divish of The Seattle Times reports.
ANALYSIS
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Enters open market
Diaz cleared waivers Friday and elected to become a free agent.
ANALYSIS
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Removed from 40-man roster
The Mariners designated Diaz for assignment Monday.
ANALYSIS
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