Keyner Martinez
San Francisco Giants (A)P
Age: 22
Bats/Throws: R/R
6'1" / 209
DOB: 8/16/2004
(22 years, 2 months, 9 days)
P
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| How Acquired: | Amateur FA (VEN) Jul'23 |
| Birthplace: | Venezuela |
Rule 5 Eligible
Dec'27
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Report: 2026 Updated
Org Rk
Ovr Rk
ETA
FV
6
88
2028
50
Fastball
50 / 55
Slider
50 / 60
Changeup
40 / 50
Command
25 / 55
RosterResource
| How Acquired: | Amateur FA (VEN) Jul'23 |
| Birthplace: | Venezuela |
Rule 5 Eligible
Dec'27
News Settings
Article Source
All
FG
RG
Show
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Preseason ProjectionsMinor Leagues
| Season | Team | Level | Age | W | L | SV | G | GS | IP | divider | K/9 | BB/9 | HR/9 | BABIP | LOB% | GB% | HR/FB | divider | vFA | divider | ERA | xERA | FIP | xFIP | WAR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | SFG | CPX | 19 | 1 | 1 | 3 | 19 | 0 | 32.2 | 6.34 | 4.41 | 0.55 | .258 | 71.8% | 47.3% | 6.7% | 3.03 | 5.83 | 5.90 | ||||||
| 2025 | SFG | CPX | 20 | 3 | 1 | 2 | 15 | 8 | 47.1 | 12.74 | 1.90 | 0.19 | .380 | 77.9% | 47.2% | 2.5% | 1.90 | 2.70 | 3.18 | ||||||
| 2025 | SFG | A | 20 | 2 | 1 | 0 | 6 | 3 | 22.0 | 12.27 | 4.50 | 0.82 | .358 | 78.8% | 51.9% | 11.8% | 2.86 | 3.96 | 3.45 | ||||||
| 2025 | SFG | MiLB | 20 | 5 | 2 | 2 | 21 | 11 | 69.1 | 12.59 | 2.73 | 0.39 | .373 | 78.2% | 48.8% | 5.3% | 2.21 | 3.10 | 3.27 | ||||||
| 2026 | Steamer | PROJ | 21 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5.80 | 4.74 | 1.30 | .299 | 69.1% | 44.2% | 5.41 | 5.43 | 5.38 | 0.0 | ||||||
| 2026 | OOPSY | PROJ | 21 | 0 | 0 | 0 | 1 | 1 | 2.9 | 6.95 | 3.96 | 1.07 | .293 | 67.1% | 4.65 | 4.61 | 0.0 | ||||||||
| 2026 | SFG | A | 21 | 4 | 5 | 0 | 22 | 22 | 93.2 | 12.88 | 4.52 | 1.06 | .308 | 63.3% | 37.0% | 14.1% | 4.61 | 4.77 | 4.61 |
| Season | Team | Level | Age | W | L | SV | G | GS | IP | divider | K/9 | BB/9 | HR/9 | BABIP | LOB% | GB% | HR/FB | divider | vFA | divider | ERA | xERA | FIP | xFIP | WAR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | SFG | CPX | 19 | 1 | 1 | 3 | 19 | 0 | 32.2 | 6.34 | 4.41 | 0.55 | .258 | 71.8% | 47.3% | 6.7% | 3.03 | 5.83 | 5.90 | ||||||
| 2025 | SFG | CPX | 20 | 3 | 1 | 2 | 15 | 8 | 47.1 | 12.74 | 1.90 | 0.19 | .380 | 77.9% | 47.2% | 2.5% | 1.90 | 2.70 | 3.18 | ||||||
| 2025 | SFG | A | 20 | 2 | 1 | 0 | 6 | 3 | 22.0 | 12.27 | 4.50 | 0.82 | .358 | 78.8% | 51.9% | 11.8% | 2.86 | 3.96 | 3.45 | ||||||
| 2025 | SFG | MiLB | 20 | 5 | 2 | 2 | 21 | 11 | 69.1 | 12.59 | 2.73 | 0.39 | .373 | 78.2% | 48.8% | 5.3% | 2.21 | 3.10 | 3.27 | ||||||
| 2026 | Steamer | PROJ | 21 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5.80 | 4.74 | 1.30 | .299 | 69.1% | 44.2% | 5.41 | 5.43 | 5.38 | 0.0 | ||||||
| 2026 | OOPSY | PROJ | 21 | 0 | 0 | 0 | 1 | 1 | 2.9 | 6.95 | 3.96 | 1.07 | .293 | 67.1% | 4.65 | 4.61 | 0.0 | ||||||||
| 2026 | SFG | A | 21 | 4 | 5 | 0 | 22 | 22 | 93.2 | 12.88 | 4.52 | 1.06 | .308 | 63.3% | 37.0% | 14.1% | 4.61 | 4.77 | 4.61 |
Preseason ProjectionsMinor Leagues
| Season | Team | Level | W | L | ERA | G | GS | QS | CG | ShO | SV | HLD | BS | IP | TBF | H | R | ER | HR | BB | IBB | HBP | WP | BK | SO |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | SFG | CPX | 1 | 1 | 3.03 | 19 | 0 | 0 | 0 | 3 | 0 | 2 | 32.2 | 141 | 27 | 15 | 11 | 2 | 16 | 0 | 3 | 4 | 1 | 23 | |
| 2025 | SFG | CPX | 3 | 1 | 1.90 | 15 | 8 | 0 | 0 | 2 | 0 | 0 | 47.1 | 188 | 42 | 13 | 10 | 1 | 10 | 0 | 2 | 2 | 0 | 67 | |
| 2025 | SFG | A | 2 | 1 | 2.86 | 6 | 3 | 0 | 0 | 0 | 0 | 0 | 22.0 | 96 | 21 | 9 | 7 | 2 | 11 | 0 | 0 | 1 | 0 | 30 | |
| 2025 | SFG | MiLB | 5 | 2 | 2.21 | 21 | 11 | 0 | 0 | 2 | 0 | 0 | 69.1 | 284 | 63 | 22 | 17 | 3 | 21 | 0 | 2 | 3 | 0 | 97 | |
| 2026 | Steamer | PROJ | 0 | 0 | 5.41 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | |||
| 2026 | OOPSY | PROJ | 0 | 0 | 4.65 | 1 | 1 | 0 | 0 | 0 | 2.9 | 12 | 3 | 2 | 2 | 0 | 1 | 0 | 0 | 2 | |||||
| 2026 | SFG | A | 4 | 5 | 4.61 | 22 | 22 | 0 | 0 | 0 | 0 | 0 | 93.2 | 399 | 73 | 56 | 48 | 11 | 47 | 0 | 6 | 5 | 3 | 134 |
| Season | Team | Level | W | L | ERA | G | GS | QS | CG | ShO | SV | HLD | BS | IP | TBF | H | R | ER | HR | BB | IBB | HBP | WP | BK | SO |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | SFG | CPX | 1 | 1 | 3.03 | 19 | 0 | 0 | 0 | 3 | 0 | 2 | 32.2 | 141 | 27 | 15 | 11 | 2 | 16 | 0 | 3 | 4 | 1 | 23 | |
| 2025 | SFG | CPX | 3 | 1 | 1.90 | 15 | 8 | 0 | 0 | 2 | 0 | 0 | 47.1 | 188 | 42 | 13 | 10 | 1 | 10 | 0 | 2 | 2 | 0 | 67 | |
| 2025 | SFG | A | 2 | 1 | 2.86 | 6 | 3 | 0 | 0 | 0 | 0 | 0 | 22.0 | 96 | 21 | 9 | 7 | 2 | 11 | 0 | 0 | 1 | 0 | 30 | |
| 2025 | SFG | MiLB | 5 | 2 | 2.21 | 21 | 11 | 0 | 0 | 2 | 0 | 0 | 69.1 | 284 | 63 | 22 | 17 | 3 | 21 | 0 | 2 | 3 | 0 | 97 | |
| 2026 | Steamer | PROJ | 0 | 0 | 5.41 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | |||
| 2026 | OOPSY | PROJ | 0 | 0 | 4.65 | 1 | 1 | 0 | 0 | 0 | 2.9 | 12 | 3 | 2 | 2 | 0 | 1 | 0 | 0 | 2 | |||||
| 2026 | SFG | A | 4 | 5 | 4.61 | 22 | 22 | 0 | 0 | 0 | 0 | 0 | 93.2 | 399 | 73 | 56 | 48 | 11 | 47 | 0 | 6 | 5 | 3 | 134 |
Preseason ProjectionsMinor LeaguesAverages
| Season | Team | Level | K/9 | BB/9 | K/BB | HR/9 | divider | K% | BB% | K-BB% | divider | AVG | WHIP | BABIP | LOB% | divider | ERA- | FIP- | divider | FIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | SFG | CPX | 6.34 | 4.41 | 1.44 | 0.55 | 16.3% | 11.3% | 5.0% | .221 | 1.32 | .258 | 71.8% | 56 | 107 | 5.83 | ||||
| 2025 | SFG | CPX | 12.74 | 1.90 | 6.70 | 0.19 | 35.6% | 5.3% | 30.3% | .239 | 1.10 | .380 | 77.9% | 37 | 53 | 2.70 | ||||
| 2025 | SFG | A | 12.27 | 4.50 | 2.73 | 0.82 | 31.3% | 11.5% | 19.8% | .247 | 1.45 | .358 | 78.8% | 62 | 85 | 3.96 | ||||
| 2025 | SFG | MiLB | 12.59 | 2.73 | 4.62 | 0.39 | 34.2% | 7.4% | 26.8% | .241 | 1.21 | .373 | 78.2% | 45 | 63 | 3.10 | ||||
| 2026 | Steamer | PROJ | 5.80 | 4.74 | 1.22 | 1.30 | 14.1% | 11.5% | 2.6% | .276 | 1.64 | .299 | 69.1% | 5.43 | ||||||
| 2026 | OOPSY | PROJ | 6.95 | 3.96 | 1.75 | 1.07 | 18.5% | 10.6% | 8.0% | .254 | 1.38 | .293 | 67.1% | 4.61 | ||||||
| 2026 | SFG | A | 12.88 | 4.52 | 2.85 | 1.06 | 33.6% | 11.8% | 21.8% | .211 | 1.28 | .308 | 63.3% | 82 | 84 | 4.77 |
| Season | Team | Level | K/9 | BB/9 | K/BB | HR/9 | divider | K% | BB% | K-BB% | divider | AVG | WHIP | BABIP | LOB% | divider | ERA- | FIP- | divider | FIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | SFG | CPX | 6.34 | 4.41 | 1.44 | 0.55 | 16.3% | 11.3% | 5.0% | .221 | 1.32 | .258 | 71.8% | 56 | 107 | 5.83 | ||||
| 2025 | SFG | CPX | 12.74 | 1.90 | 6.70 | 0.19 | 35.6% | 5.3% | 30.3% | .239 | 1.10 | .380 | 77.9% | 37 | 53 | 2.70 | ||||
| 2025 | SFG | A | 12.27 | 4.50 | 2.73 | 0.82 | 31.3% | 11.5% | 19.8% | .247 | 1.45 | .358 | 78.8% | 62 | 85 | 3.96 | ||||
| 2025 | SFG | MiLB | 12.59 | 2.73 | 4.62 | 0.39 | 34.2% | 7.4% | 26.8% | .241 | 1.21 | .373 | 78.2% | 45 | 63 | 3.10 | ||||
| 2026 | Steamer | PROJ | 5.80 | 4.74 | 1.22 | 1.30 | 14.1% | 11.5% | 2.6% | .276 | 1.64 | .299 | 69.1% | 5.43 | ||||||
| 2026 | OOPSY | PROJ | 6.95 | 3.96 | 1.75 | 1.07 | 18.5% | 10.6% | 8.0% | .254 | 1.38 | .293 | 67.1% | 4.61 | ||||||
| 2026 | SFG | A | 12.88 | 4.52 | 2.85 | 1.06 | 33.6% | 11.8% | 21.8% | .211 | 1.28 | .308 | 63.3% | 82 | 84 | 4.77 |
Preseason ProjectionsMinor Leagues
| Season | Team | Level | GB/FB | LD% | GB% | FB% | IFFB% | HR/FB | IFH% | BUH% | divider | Pull% | Cent% | Oppo% | divider | Soft% | Med% | Hard% | divider | SIERA | xFIP- | xFIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | SFG | CPX | 1.47 | 20.4% | 47.3% | 32.3% | 20.0% | 6.7% | 46.5% | 20.2% | 33.3% | 109 | 5.90 | |||||||||
| 2025 | SFG | CPX | 1.28 | 15.7% | 47.2% | 37.0% | 25.0% | 2.5% | 26.6% | 22.0% | 51.4% | 63 | 3.18 | |||||||||
| 2025 | SFG | A | 1.65 | 16.7% | 51.9% | 31.5% | 23.5% | 11.8% | 41.8% | 29.1% | 29.1% | 76 | 3.45 | |||||||||
| 2025 | SFG | MiLB | 1.39 | 16.0% | 48.8% | 35.2% | 24.6% | 5.3% | 31.7% | 24.4% | 43.9% | 67 | 3.27 | |||||||||
| 2026 | Steamer | PROJ | 20.2% | 44.2% | 35.5% | 5.38 | ||||||||||||||||
| 2026 | SFG | A | 0.99 | 25.5% | 37.0% | 37.5% | 32.1% | 14.1% | 42.0% | 25.5% | 32.5% | 83 | 4.61 |
| Season | Team | Level | GB/FB | LD% | GB% | FB% | IFFB% | HR/FB | IFH% | BUH% | divider | Pull% | Cent% | Oppo% | divider | Soft% | Med% | Hard% | divider | SIERA | xFIP- | xFIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | SFG | CPX | 1.47 | 20.4% | 47.3% | 32.3% | 20.0% | 6.7% | 46.5% | 20.2% | 33.3% | 109 | 5.90 | |||||||||
| 2025 | SFG | CPX | 1.28 | 15.7% | 47.2% | 37.0% | 25.0% | 2.5% | 26.6% | 22.0% | 51.4% | 63 | 3.18 | |||||||||
| 2025 | SFG | A | 1.65 | 16.7% | 51.9% | 31.5% | 23.5% | 11.8% | 41.8% | 29.1% | 29.1% | 76 | 3.45 | |||||||||
| 2025 | SFG | MiLB | 1.39 | 16.0% | 48.8% | 35.2% | 24.6% | 5.3% | 31.7% | 24.4% | 43.9% | 67 | 3.27 | |||||||||
| 2026 | Steamer | PROJ | 20.2% | 44.2% | 35.5% | 5.38 | ||||||||||||||||
| 2026 | SFG | A | 0.99 | 25.5% | 37.0% | 37.5% | 32.1% | 14.1% | 42.0% | 25.5% | 32.5% | 83 | 4.61 |
Preseason ProjectionsMinor Leagues
MLB F-Strike%, SwStr%, CStr%, CSW% are from the Sports Info Solution data source.
All MiLB and Pace data are from Statcast.
All MiLB and Pace data are from Statcast.
Preseason ProjectionsMinor LeaguesAverages
| Season | Team | Level | O-Swing% | Z-Swing% | Swing% | divider | O-Contact% | Z-Contact% | Contact% | Zone% | divider | F-Strike% | SwStr% | CStr% | CSW% | divider | Pace |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | SFG | CPX | 52.9% | 71.3% | 34.0% | 15.2% | 12.2% | 27.3% | |||||||||
| 2025 | SFG | CPX | 48.4% | 66.6% | 50.0% | 16.2% | 20.3% | 36.5% | |||||||||
| 2025 | SFG | A | 43.6% | 72.2% | 43.8% | 12.1% | 17.6% | 29.7% | |||||||||
| 2025 | SFG | MiLB | 46.6% | 68.6% | 47.9% | 14.6% | 19.3% | 33.9% | |||||||||
| 2026 | SFG | A | 47.4% | 68.2% | 50.9% | 15.1% | 15.9% | 31.0% |
| Season | Team | Level | O-Swing% | Z-Swing% | Swing% | divider | O-Contact% | Z-Contact% | Contact% | Zone% | divider | F-Strike% | SwStr% | CStr% | CSW% | divider | Pace |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | SFG | CPX | 52.9% | 71.3% | 34.0% | 15.2% | 12.2% | 27.3% | |||||||||
| 2025 | SFG | CPX | 48.4% | 66.6% | 50.0% | 16.2% | 20.3% | 36.5% | |||||||||
| 2025 | SFG | A | 43.6% | 72.2% | 43.8% | 12.1% | 17.6% | 29.7% | |||||||||
| 2025 | SFG | MiLB | 46.6% | 68.6% | 47.9% | 14.6% | 19.3% | 33.9% | |||||||||
| 2026 | SFG | A | 47.4% | 68.2% | 50.9% | 15.1% | 15.9% | 31.0% |
