Alfonso Perez
San Francisco Giants (DSL)P
Age: 19
Bats/Throws: R/R
6'2" / 175
DOB: 8/14/2005
(19 years, 10 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | SFG | DSL | 16 | 0 | 1 | 0 | 14 | 0 | 16.2 | 5.94 | 4.86 | 0.00 | .361 | 41.7% | 33.3% | 0.0% | 7.56 | 5.01 | 6.20 | ||||||
| 2023 | SFG | DSL | 17 | 2 | 1 | 0 | 11 | 10 | 45.0 | 5.00 | 3.00 | 0.80 | .237 | 58.7% | 34.3% | 6.8% | 3.80 | 5.22 | 5.02 | ||||||
| 2024 | SFG | DSL | 18 | 0 | 3 | 0 | 11 | 8 | 38.2 | 6.75 | 4.19 | 0.47 | .276 | 68.2% | 46.1% | 5.1% | 4.42 | 5.17 | 5.06 | ||||||
| 2025 | Steamer | PROJ | 19 | 0 | 0 | 0 | 0 | 0 | 1.0 | 3.68 | 6.45 | 1.75 | .296 | 66.1% | 39.8% | 7.18 | 7.20 | 6.89 | 0.0 | ||||||
| 2025 | SFG | DSL | 19 | 2 | 0 | 0 | 5 | 0 | 7.1 | 11.05 | 1.23 | 0.00 | .353 | 87.5% | 23.5% | 0.0% | 1.23 | 2.41 | 3.15 | ||||||
| 2025 | Steamer | ROS | 0 | 0 | 0 | 1 | 0 | 1.0 | 4.19 | 8.06 | 1.56 | .296 | 67.4% | 7.18 | 7.26 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | SFG | DSL | 16 | 0 | 1 | 0 | 14 | 0 | 16.2 | 5.94 | 4.86 | 0.00 | .361 | 41.7% | 33.3% | 0.0% | 7.56 | 5.01 | 6.20 | ||||||
| 2023 | SFG | DSL | 17 | 2 | 1 | 0 | 11 | 10 | 45.0 | 5.00 | 3.00 | 0.80 | .237 | 58.7% | 34.3% | 6.8% | 3.80 | 5.22 | 5.02 | ||||||
| 2024 | SFG | DSL | 18 | 0 | 3 | 0 | 11 | 8 | 38.2 | 6.75 | 4.19 | 0.47 | .276 | 68.2% | 46.1% | 5.1% | 4.42 | 5.17 | 5.06 | ||||||
| 2025 | Steamer | PROJ | 19 | 0 | 0 | 0 | 0 | 0 | 1.0 | 3.68 | 6.45 | 1.75 | .296 | 66.1% | 39.8% | 7.18 | 7.20 | 6.89 | 0.0 | ||||||
| 2025 | SFG | DSL | 19 | 2 | 0 | 0 | 5 | 0 | 7.1 | 11.05 | 1.23 | 0.00 | .353 | 87.5% | 23.5% | 0.0% | 1.23 | 2.41 | 3.15 | ||||||
| 2025 | Steamer | ROS | 0 | 0 | 0 | 1 | 0 | 1.0 | 4.19 | 8.06 | 1.56 | .296 | 67.4% | 7.18 | 7.26 | 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 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | SFG | DSL | 0 | 1 | 7.56 | 14 | 0 | 0 | 0 | 0 | 0 | 1 | 16.2 | 86 | 22 | 21 | 14 | 0 | 9 | 0 | 5 | 7 | 1 | 11 | |
| 2023 | SFG | DSL | 2 | 1 | 3.80 | 11 | 10 | 0 | 0 | 0 | 0 | 0 | 45.0 | 186 | 37 | 26 | 19 | 4 | 15 | 0 | 3 | 9 | 0 | 25 | |
| 2024 | SFG | DSL | 0 | 3 | 4.42 | 11 | 8 | 0 | 0 | 0 | 0 | 1 | 38.2 | 173 | 34 | 21 | 19 | 2 | 18 | 0 | 8 | 5 | 3 | 29 | |
| 2025 | Steamer | PROJ | 0 | 0 | 7.18 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | |||
| 2025 | SFG | DSL | 2 | 0 | 1.23 | 5 | 0 | 0 | 0 | 0 | 1 | 1 | 7.1 | 28 | 6 | 1 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 9 | |
| 2025 | Steamer | ROS | 0 | 0 | 7.18 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5 | 1 | 1 | 1 | 0 | 1 | 0 | 0 |
| 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 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | SFG | DSL | 0 | 1 | 7.56 | 14 | 0 | 0 | 0 | 0 | 0 | 1 | 16.2 | 86 | 22 | 21 | 14 | 0 | 9 | 0 | 5 | 7 | 1 | 11 | |
| 2023 | SFG | DSL | 2 | 1 | 3.80 | 11 | 10 | 0 | 0 | 0 | 0 | 0 | 45.0 | 186 | 37 | 26 | 19 | 4 | 15 | 0 | 3 | 9 | 0 | 25 | |
| 2024 | SFG | DSL | 0 | 3 | 4.42 | 11 | 8 | 0 | 0 | 0 | 0 | 1 | 38.2 | 173 | 34 | 21 | 19 | 2 | 18 | 0 | 8 | 5 | 3 | 29 | |
| 2025 | Steamer | PROJ | 0 | 0 | 7.18 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | |||
| 2025 | SFG | DSL | 2 | 0 | 1.23 | 5 | 0 | 0 | 0 | 0 | 1 | 1 | 7.1 | 28 | 6 | 1 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 9 | |
| 2025 | Steamer | ROS | 0 | 0 | 7.18 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5 | 1 | 1 | 1 | 0 | 1 | 0 | 0 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | SFG | DSL | 5.94 | 4.86 | 1.22 | 0.00 | 12.8% | 10.5% | 2.3% | .306 | 1.86 | .361 | 41.7% | 161 | 111 | 5.01 | ||||
| 2023 | SFG | DSL | 5.00 | 3.00 | 1.67 | 0.80 | 13.4% | 8.1% | 5.4% | .220 | 1.16 | .237 | 58.7% | 77 | 105 | 5.22 | ||||
| 2024 | SFG | DSL | 6.75 | 4.19 | 1.61 | 0.47 | 16.8% | 10.4% | 6.4% | .231 | 1.34 | .276 | 68.2% | 90 | 104 | 5.17 | ||||
| 2025 | Steamer | PROJ | 3.68 | 6.45 | 0.57 | 1.75 | 8.4% | 14.7% | -6.3% | .300 | 1.95 | .296 | 66.1% | 7.20 | ||||||
| 2025 | SFG | DSL | 11.05 | 1.23 | 9.00 | 0.00 | 32.1% | 3.6% | 28.6% | .231 | 0.95 | .353 | 87.5% | 24 | 46 | 2.41 | ||||
| 2025 | Steamer | ROS | 4.19 | 8.06 | 0.52 | 1.56 | 9.3% | 17.9% | -8.6% | .292 | 2.08 | .296 | 67.4% | 7.26 |
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | SFG | DSL | 5.94 | 4.86 | 1.22 | 0.00 | 12.8% | 10.5% | 2.3% | .306 | 1.86 | .361 | 41.7% | 161 | 111 | 5.01 | ||||
| 2023 | SFG | DSL | 5.00 | 3.00 | 1.67 | 0.80 | 13.4% | 8.1% | 5.4% | .220 | 1.16 | .237 | 58.7% | 77 | 105 | 5.22 | ||||
| 2024 | SFG | DSL | 6.75 | 4.19 | 1.61 | 0.47 | 16.8% | 10.4% | 6.4% | .231 | 1.34 | .276 | 68.2% | 90 | 104 | 5.17 | ||||
| 2025 | Steamer | PROJ | 3.68 | 6.45 | 0.57 | 1.75 | 8.4% | 14.7% | -6.3% | .300 | 1.95 | .296 | 66.1% | 7.20 | ||||||
| 2025 | SFG | DSL | 11.05 | 1.23 | 9.00 | 0.00 | 32.1% | 3.6% | 28.6% | .231 | 0.95 | .353 | 87.5% | 24 | 46 | 2.41 | ||||
| 2025 | Steamer | ROS | 4.19 | 8.06 | 0.52 | 1.56 | 9.3% | 17.9% | -8.6% | .292 | 2.08 | .296 | 67.4% | 7.26 |
