Reiver Sanmartin

Reiver Sanmartin

30-Year-Old PitcherRP
San Francisco Giants
60-Day IL
Injury Hip
Est. Return 6/9/2026
2026 Fantasy Outlook
There was no outlook written for Reiver Sanmartin in 2026. Check out the latest news below for more on his current fantasy value.
Signed a one-year contract with the Giants in March of 2026.
Goes on 60-day injured list
PSan Francisco Giants
Hip
March 25, 2026
The Giants placed Sanmartin (hip) on the 60-day injured list Wednesday.
Analysis
The southpaw will be sidelined until June after suffering a right hip flexor strain earlier this month. Even when healthy, Sanmartin is not a lock to return to the active roster with the big club.
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Pitching Stats
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2026 MLB Game Log
2026
2025
2023
2022
2021
2026 MLB Game Log
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2025 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 2024
 
 
-100%
BAA vs LHP
2026
No Stats
2025
 
 
-100%
BAA vs LHP
2024
No Stats
BAA Batters K BB H 2B 3B HR
Since 2024vs Left .000 1 0 0 0 0 0 0
Since 2024vs Right .333 7 2 1 2 1 0 0
2026vs Left 0 0 0 0 0 0 0 0
2026vs Right 0 0 0 0 0 0 0 0
2025vs Left .000 1 0 0 0 0 0 0
2025vs Right .333 7 2 1 2 1 0 0
2024vs Left 0 0 0 0 0 0 0 0
2024vs Right 0 0 0 0 0 0 0 0
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Home/Away Pitching Splits
Since 2024
No Stats
2026
No Stats
2025
No Stats
2024
No Stats
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2024Home 0.00 1.80 1.2 0 0 0 10.8 5.4 0.0
Since 2024Away 0 0 0 0 0 0 0 0 0
2026Home 0 0 0 0 0 0 0 0 0
2026Away 0 0 0 0 0 0 0 0 0
2025Home 0.00 1.80 1.2 0 0 0 10.8 5.4 0.0
2025Away 0 0 0 0 0 0 0 0 0
2024Home 0 0 0 0 0 0 0 0 0
2024Away 0 0 0 0 0 0 0 0 0
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Defensive Stats
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Stats Vs Today's Lineup
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Recent RotoWire Articles Featuring Reiver Sanmartin See More
Recent RotoWire Articles Featuring Reiver Sanmartin See More
Past Fantasy Outlooks
2023
2022
Sanmartin was utterly dreadful in four starts for the Reds last season. He put up a 19.85 ERA and 3.09 WHIP in those outings, with batters hitting .456 with a 1.294 OPS against the left-hander. Sanmartin was much better in relief, though, with a 2.96 ERA over 41 appearances while limiting them to a .694 OPS. The southpaw's drastic platoon splits (.717 OPS versus left-handed batters, .933 OPS against right-handers) also point to the bullpen being his long-term home. Sanmartin currently projects as the lone lefty in manager David Bell's relief corps, so he could find himself in high-leverage spots when the situation calls for it.
Sanmartin is still a bit of an unknown in many circles, but he had a 3.94 ERA, 54.0 GB% and 19.2 K-BB% in 82.1 innings at Triple-A and then finished his season with two strong starts in the majors. Of course, it helped that both of those starts came against the Pirates. The 25-year-old lefty only averaged 89.5 mph on his fourseam fastball, but it had serious horizontal break and was very tough to pick up from a three-quarters lefty slot. His slider and changeup are strong secondary offerings, so it's a starter's repertoire. Given the lack of velocity, we recommend treading cautiously, as deception artists often have a short shelf life in the majors. However, Sanmartin has a decent chance of opening the year with a spot in the Reds' starting rotation, and he has a good recent statistical track record.
More Fantasy News
Sidelined three months
PSan Francisco Giants
Hip
March 9, 2026
Sanmartin will be sidelined for three months after being diagnosed Monday with a severe right hip flexor strain, Susan Slusser of the San Francisco Chronicle reports.
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Battling quad injury
PSan Francisco Giants
Quadriceps
March 4, 2026
Sanmartin suffered a minor quadriceps strain during a recent exhibition game appearance for Team Colombia, Susan Slusser of the San Francisco Chronicle reports.
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Headed to San Francisco
PSan Francisco Giants
November 6, 2025
The Giants claimed Sanmartin off waivers from the Reds on Thursday, Alex Pavlovic of NBC Sports Bay Area reports.
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Jettisoned to minors
PCincinnati Reds
September 3, 2025
The Reds optioned Sanmartin to Triple-A Louisville on Wednesday.
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Contract selected
PCincinnati Reds
September 2, 2025
The Reds selected Sanmartin's contract from Triple-A Louisville on Tuesday, Charlie Goldsmith of Fox 19 Now Cincinnati reports.
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