Jhonathan Diaz

Jhonathan Diaz

28-Year-Old PitcherRP
Seattle Mariners AAA
2025 Fantasy Outlook
There was no outlook written for Jhonathan Diaz in 2025. Check out the latest news below for more on his current fantasy value.
$Signed a one-year, minor-league contract with the Mariners in February of 2025.
Heading to minor-league camp
PSeattle Mariners  AAA
March 10, 2025
The Mariners reassigned Diaz to minor-league camp Monday.
ANALYSIS
Diaz has been getting stretched out as a starter during spring training, but he wasn't in contention for a spot in Seattle's Opening Day rotation, even with the Mariners set to begin the campaign without George Kirby (shoulder). Emerson Hancock is expected to get the first crack at replacing Kirby, but Diaz could be among the next pitchers in line to make spot starts if the Mariners lose another rotation member to an injury. Diaz will continue to make regular turns through the rotation at Triple-A Tacoma until he might be needed by the big club.
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Pitching Stats
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2024
2023
2022
2021
2024 MLB Game Log
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2023 MLB Game Log
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2022 MLB Game Log
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2021 MLB Game Log
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Left/Right Pitching Splits
Since 2023
 
 
-33%
BAA vs LHP
2025
No Stats
2024
 
 
-27%
BAA vs LHP
2023
 
 
-37%
BAA vs LHP
BAA Batters K BB H 2B 3B HR
Since 2023vs Left .276 33 6 3 8 2 1 0
Since 2023vs Right .413 56 6 7 19 6 0 2
2025vs Left 0 0 0 0 0 0 0 0
2025vs Right 0 0 0 0 0 0 0 0
2024vs Left .263 19 5 0 5 2 1 0
2024vs Right .360 28 3 3 9 1 0 2
2023vs Left .300 14 1 3 3 0 0 0
2023vs Right .476 28 3 4 10 5 0 0
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Home/Away Pitching Splits
Since 2023
 
 
-85%
ERA on Road
2025
No Stats
2024
 
 
-100%
ERA on Road
2023
 
 
-94%
ERA on Road
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2023Home 10.13 2.63 10.2 0 0 0 5.1 5.1 1.7
Since 2023Away 1.50 1.50 6.0 0 1 0 9.0 6.0 0.0
2025Home 0 0 0 0 0 0 0 0 0
2025Away 0 0 0 0 0 0 0 0 0
2024Home 5.19 1.85 8.2 0 0 0 6.2 3.1 2.1
2024Away 0.00 1.00 1.0 0 1 0 18.0 0.0 0.0
2023Home 31.50 6.00 2.0 0 0 0 0.0 13.5 0.0
2023Away 1.80 1.60 5.0 0 0 0 7.2 7.2 0.0
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Defensive Stats
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Recent RotoWire Articles Featuring Jhonathan Diaz See More
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274 days ago
Tyler Glasnow is one of the top-ranked starters in Todd Zola's Weekly Pitcher Rankings, as we're halfway through the MLB schedule with plenty of intrigue on what the second half has in store.
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
Joins camp as NRI
PSeattle Mariners  AAA
February 12, 2025
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
PFree Agent  AAA
February 7, 2025
Diaz cleared waivers Friday and elected to become a free agent.
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Removed from 40-man roster
PSeattle Mariners  AAA
February 3, 2025
The Mariners designated Diaz for assignment Monday.
ANALYSIS
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Sent to minors
PSeattle Mariners  AAA
September 23, 2024
The Mariners optioned Diaz to their spring training complex Monday.
ANALYSIS
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Moves up from Triple-A
PSeattle Mariners  AAA
September 1, 2024
The Mariners recalled Diaz from Triple-A Tacoma prior to Sunday's 3-2 loss to the Angels.
ANALYSIS
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