Keyner Martinez
San Francisco Giants (A)P
Age: 21
Bats/Throws: R/R
6'1" / 209
DOB: 8/16/2004
(21 years, 11 months, 9 days)
P
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Preseason ProjectionsIn-Season ProjectionsMinor Leagues
| Season | Team | Level | Age | W W - Wins | L L - Losses | SV SV - Saves | G G - Games Pitched | GS GS - Games Started | IP IP - Innings Pitched | divider | K/9 K/9 - Strikeouts per 9 Innings ((SO*9)/IP) | BB/9 BB/9 - Walks per 9 Innings ((BB*9)/IP) | HR/9 HR/9 - Home Runs per 9 Innings ((HR*9)/IP) | BABIP BABIP - Batting Average on Balls in Play | LOB% LOB% - Left on Base Percentage | GB% GB% - Ground Ball Percentage (GB/BIP) | HR/FB HR/FB - Home Run to Fly Ball Ratio | divider | vFA vFA - Fourseam Fastball velocity (Pitch Info) | divider | ERA ERA - Earned Run Average ((ER*9)/IP) | xERA xERA - Expected ERA | FIP FIP - Fielder Independent Pitching on an ERA scale | xFIP xFIP - Expected Fielder Independent Pitching where Home Runs are calculated as 10.5% of Fly Balls induced | WAR WAR - Wins Above Replacement |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 3 | 3 | 0 | 16 | 16 | 69.0 | 13.57 | 4.96 | 1.17 | .309 | 66.7% | 39.2% | 16.1% | 4.57 | 5.04 | 4.68 | ||||||
| 2026 | Steamer | ROS | 21 | 0 | 0 | 0 | 0 | 0 | 1.0 | 6.55 | 5.20 | 1.18 | .292 | 70.2% | 5.08 | 5.24 | 0.0 | ||||||||
| 2026 | OOPSY | ROS | 21 | 0 | 0 | 0 | 1 | 1 | 3.6 | 7.85 | 4.66 | 1.11 | .289 | 68.3% | 4.65 | 4.70 | 0.0 |
| Season | Team | Level | Age | W W - Wins | L L - Losses | SV SV - Saves | G G - Games Pitched | GS GS - Games Started | IP IP - Innings Pitched | divider | K/9 K/9 - Strikeouts per 9 Innings ((SO*9)/IP) | BB/9 BB/9 - Walks per 9 Innings ((BB*9)/IP) | HR/9 HR/9 - Home Runs per 9 Innings ((HR*9)/IP) | BABIP BABIP - Batting Average on Balls in Play | LOB% LOB% - Left on Base Percentage | GB% GB% - Ground Ball Percentage (GB/BIP) | HR/FB HR/FB - Home Run to Fly Ball Ratio | divider | vFA vFA - Fourseam Fastball velocity (Pitch Info) | divider | ERA ERA - Earned Run Average ((ER*9)/IP) | xERA xERA - Expected ERA | FIP FIP - Fielder Independent Pitching on an ERA scale | xFIP xFIP - Expected Fielder Independent Pitching where Home Runs are calculated as 10.5% of Fly Balls induced | WAR WAR - Wins Above Replacement |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 3 | 3 | 0 | 16 | 16 | 69.0 | 13.57 | 4.96 | 1.17 | .309 | 66.7% | 39.2% | 16.1% | 4.57 | 5.04 | 4.68 | ||||||
| 2026 | Steamer | ROS | 21 | 0 | 0 | 0 | 0 | 0 | 1.0 | 6.55 | 5.20 | 1.18 | .292 | 70.2% | 5.08 | 5.24 | 0.0 | ||||||||
| 2026 | OOPSY | ROS | 21 | 0 | 0 | 0 | 1 | 1 | 3.6 | 7.85 | 4.66 | 1.11 | .289 | 68.3% | 4.65 | 4.70 | 0.0 |
Preseason ProjectionsIn-Season ProjectionsMinor Leagues
| Season | Team | Level | W W - Wins | L L - Losses | ERA ERA - Earned Run Average ((ER*9)/IP) | G G - Games Pitched | GS GS - Games Started | QS QS - Quality Starts; pitched at least 6 innings and gave up 3 or fewer earned runs | CG CG - Complete Games | ShO ShO - Shoutouts | SV SV - Saves | HLD HLD - Holds | BS BS - Blown Saves | IP IP - Innings Pitched | TBF TBF - Total Batters Faced | H H - Hits Allowed | R R - Runs Allowed | ER ER - Earned Runs | HR HR - Home Runs | BB BB - Walks | IBB IBB - Intentional | HBP HBP - Hit Batters | WP WP - Wild Pitches | BK BK - Balks | SO SO - Strikeouts |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 3 | 3 | 4.57 | 16 | 16 | 0 | 0 | 0 | 0 | 0 | 69.0 | 295 | 52 | 40 | 35 | 9 | 38 | 0 | 5 | 3 | 2 | 104 | |
| 2026 | Steamer | ROS | 0 | 0 | 5.08 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5 | 1 | 1 | 1 | 0 | 1 | 0 | 1 | ||||
| 2026 | OOPSY | ROS | 0 | 0 | 4.65 | 1 | 1 | 0 | 0 | 0 | 3.6 | 15 | 3 | 2 | 2 | 0 | 2 | 0 | 0 | 3 |
| Season | Team | Level | W W - Wins | L L - Losses | ERA ERA - Earned Run Average ((ER*9)/IP) | G G - Games Pitched | GS GS - Games Started | QS QS - Quality Starts; pitched at least 6 innings and gave up 3 or fewer earned runs | CG CG - Complete Games | ShO ShO - Shoutouts | SV SV - Saves | HLD HLD - Holds | BS BS - Blown Saves | IP IP - Innings Pitched | TBF TBF - Total Batters Faced | H H - Hits Allowed | R R - Runs Allowed | ER ER - Earned Runs | HR HR - Home Runs | BB BB - Walks | IBB IBB - Intentional | HBP HBP - Hit Batters | WP WP - Wild Pitches | BK BK - Balks | SO SO - Strikeouts |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 3 | 3 | 4.57 | 16 | 16 | 0 | 0 | 0 | 0 | 0 | 69.0 | 295 | 52 | 40 | 35 | 9 | 38 | 0 | 5 | 3 | 2 | 104 | |
| 2026 | Steamer | ROS | 0 | 0 | 5.08 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5 | 1 | 1 | 1 | 0 | 1 | 0 | 1 | ||||
| 2026 | OOPSY | ROS | 0 | 0 | 4.65 | 1 | 1 | 0 | 0 | 0 | 3.6 | 15 | 3 | 2 | 2 | 0 | 2 | 0 | 0 | 3 |
Preseason ProjectionsIn-Season ProjectionsMinor LeaguesAverages
| Season | Team | Level | K/9 K/9 - Strikeouts per 9 Innings ((SO*9)/IP) | BB/9 BB/9 - Walks per 9 Innings ((BB*9)/IP) | K/BB K/BB - Strikeout to Walk Ratio (SO/BB) | HR/9 HR/9 - Home Runs per 9 Innings ((HR*9)/IP) | divider | K% K% - Strikeout Percentage (SO/TBF) | BB% BB% - Walk Percentage (BB/TBF) | K-BB% K-BB% - The difference between strikeout percentage and walk percentage | divider | AVG AVG - Batting Average Against | WHIP WHIP - Walks + Hits divided by Innings Pitched | BABIP BABIP - Batting Average on Balls in Play | LOB% LOB% - Left on Base Percentage | divider | ERA- ERA- - ERA adjusted for park and league where 100 is average and lower is better | FIP- FIP- - FIP adjusted for park and league where 100 is average and lower is better | divider | FIP FIP - Fielder Independent Pitching on an ERA scale |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 13.57 | 4.96 | 2.74 | 1.17 | 35.3% | 12.9% | 22.4% | .206 | 1.30 | .309 | 66.7% | 80 | 88 | 5.04 | ||||
| 2026 | Steamer | ROS | 6.55 | 5.20 | 1.26 | 1.18 | 16.0% | 12.7% | 3.3% | .262 | 1.60 | .292 | 70.2% | 5.24 | ||||||
| 2026 | OOPSY | ROS | 7.85 | 4.66 | 1.68 | 1.11 | 20.6% | 12.3% | 8.4% | .244 | 1.41 | .289 | 68.3% | 4.70 |
| Season | Team | Level | K/9 K/9 - Strikeouts per 9 Innings ((SO*9)/IP) | BB/9 BB/9 - Walks per 9 Innings ((BB*9)/IP) | K/BB K/BB - Strikeout to Walk Ratio (SO/BB) | HR/9 HR/9 - Home Runs per 9 Innings ((HR*9)/IP) | divider | K% K% - Strikeout Percentage (SO/TBF) | BB% BB% - Walk Percentage (BB/TBF) | K-BB% K-BB% - The difference between strikeout percentage and walk percentage | divider | AVG AVG - Batting Average Against | WHIP WHIP - Walks + Hits divided by Innings Pitched | BABIP BABIP - Batting Average on Balls in Play | LOB% LOB% - Left on Base Percentage | divider | ERA- ERA- - ERA adjusted for park and league where 100 is average and lower is better | FIP- FIP- - FIP adjusted for park and league where 100 is average and lower is better | divider | FIP FIP - Fielder Independent Pitching on an ERA scale |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 13.57 | 4.96 | 2.74 | 1.17 | 35.3% | 12.9% | 22.4% | .206 | 1.30 | .309 | 66.7% | 80 | 88 | 5.04 | ||||
| 2026 | Steamer | ROS | 6.55 | 5.20 | 1.26 | 1.18 | 16.0% | 12.7% | 3.3% | .262 | 1.60 | .292 | 70.2% | 5.24 | ||||||
| 2026 | OOPSY | ROS | 7.85 | 4.66 | 1.68 | 1.11 | 20.6% | 12.3% | 8.4% | .244 | 1.41 | .289 | 68.3% | 4.70 |
