William Kempner
San Francisco Giants (AA)P
Age: 23
Bats/Throws: R/R
6'0" / 222
DOB: 6/18/2001
(23 years, 1 month, 9 days)
P
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Preseason ProjectionsIn-Season ProjectionsMinor LeaguesSpring Training
| 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 | CPX | 21 | 1 | 0 | 0 | 2 | 0 | 3.1 | 13.50 | 5.40 | 0.00 | .500 | 83.3% | 71.4% | 0.0% | 2.70 | 3.06 | 3.06 | ||||||
| 2022 | SFG | A | 21 | 0 | 0 | 0 | 3 | 2 | 5.2 | 9.53 | 6.35 | 1.59 | .333 | 75.5% | 25.0% | 12.5% | 6.35 | 7.50 | 7.15 | ||||||
| 2023 | SFG | A | 22 | 1 | 3 | 1 | 14 | 5 | 27.0 | 9.67 | 5.00 | 0.00 | .280 | 56.1% | 45.7% | 0.0% | 4.67 | 4.18 | 5.27 | ||||||
| 2023 | SFG | A+ | 22 | 3 | 2 | 0 | 23 | 0 | 34.0 | 12.44 | 3.44 | 1.32 | .311 | 79.5% | 44.3% | 17.2% | 2.91 | 4.44 | 3.77 | ||||||
| 2023 | SFG | AA | 22 | 0 | 0 | 0 | 1 | 0 | 1.2 | 10.80 | 10.80 | 0.00 | .500 | 80.0% | 16.7% | 0.0% | 5.40 | 4.48 | 6.21 | ||||||
| 2024 | Steamer Steamer | PROJ | 23 | 0 | 0 | 0 | 1 | 0 | 1.0 | 7.71 | 4.16 | 1.23 | .298 | 70.4% | 42.0% | 4.81 | 4.88 | 4.99 | 0.0 | ||||||
| 2024 | Steamer Steamer (RoS) | ROS | 0 | 0 | 0 | 1 | 0 | 1.0 | 7.54 | 3.93 | 1.13 | .295 | 70.8% | 4.55 | 4.58 | 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 | CPX | 21 | 1 | 0 | 0 | 2 | 0 | 3.1 | 13.50 | 5.40 | 0.00 | .500 | 83.3% | 71.4% | 0.0% | 2.70 | 3.06 | 3.06 | ||||||
| 2022 | SFG | A | 21 | 0 | 0 | 0 | 3 | 2 | 5.2 | 9.53 | 6.35 | 1.59 | .333 | 75.5% | 25.0% | 12.5% | 6.35 | 7.50 | 7.15 | ||||||
| 2023 | SFG | A | 22 | 1 | 3 | 1 | 14 | 5 | 27.0 | 9.67 | 5.00 | 0.00 | .280 | 56.1% | 45.7% | 0.0% | 4.67 | 4.18 | 5.27 | ||||||
| 2023 | SFG | A+ | 22 | 3 | 2 | 0 | 23 | 0 | 34.0 | 12.44 | 3.44 | 1.32 | .311 | 79.5% | 44.3% | 17.2% | 2.91 | 4.44 | 3.77 | ||||||
| 2023 | SFG | AA | 22 | 0 | 0 | 0 | 1 | 0 | 1.2 | 10.80 | 10.80 | 0.00 | .500 | 80.0% | 16.7% | 0.0% | 5.40 | 4.48 | 6.21 | ||||||
| 2024 | Steamer Steamer | PROJ | 23 | 0 | 0 | 0 | 1 | 0 | 1.0 | 7.71 | 4.16 | 1.23 | .298 | 70.4% | 42.0% | 4.81 | 4.88 | 4.99 | 0.0 | ||||||
| 2024 | Steamer Steamer (RoS) | ROS | 0 | 0 | 0 | 1 | 0 | 1.0 | 7.54 | 3.93 | 1.13 | .295 | 70.8% | 4.55 | 4.58 | 0.0 |
Preseason ProjectionsIn-Season ProjectionsMinor LeaguesSpring Training
| 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 | CPX | 1 | 0 | 2.70 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 3.1 | 15 | 4 | 1 | 1 | 0 | 2 | 0 | 0 | 3 | 0 | 5 | |
| 2022 | SFG | A | 0 | 0 | 6.35 | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 5.2 | 28 | 6 | 4 | 4 | 1 | 4 | 0 | 2 | 0 | 0 | 6 | |
| 2023 | SFG | A | 1 | 3 | 4.67 | 14 | 5 | 0 | 0 | 1 | 1 | 0 | 27.0 | 124 | 21 | 18 | 14 | 0 | 15 | 0 | 5 | 2 | 0 | 29 | |
| 2023 | SFG | A+ | 3 | 2 | 2.91 | 23 | 0 | 0 | 0 | 0 | 2 | 3 | 34.0 | 144 | 28 | 15 | 11 | 5 | 13 | 0 | 5 | 5 | 0 | 47 | |
| 2023 | SFG | AA | 0 | 0 | 5.40 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1.2 | 10 | 3 | 1 | 1 | 0 | 2 | 0 | 0 | 0 | 0 | 2 | |
| 2024 | Steamer Steamer | PROJ | 0 | 0 | 4.81 | 1 | 0 | 0 | 0 | 0 | 0 | 1.0 | 4 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | |||||
| 2024 | Steamer Steamer (RoS) | ROS | 0 | 0 | 4.55 | 1 | 0 | 0 | 0 | 0 | 0 | 1.0 | 4 | 1 | 1 | 1 | 0 | 0 | 0 | 1 |
| 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 | CPX | 1 | 0 | 2.70 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 3.1 | 15 | 4 | 1 | 1 | 0 | 2 | 0 | 0 | 3 | 0 | 5 | |
| 2022 | SFG | A | 0 | 0 | 6.35 | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 5.2 | 28 | 6 | 4 | 4 | 1 | 4 | 0 | 2 | 0 | 0 | 6 | |
| 2023 | SFG | A | 1 | 3 | 4.67 | 14 | 5 | 0 | 0 | 1 | 1 | 0 | 27.0 | 124 | 21 | 18 | 14 | 0 | 15 | 0 | 5 | 2 | 0 | 29 | |
| 2023 | SFG | A+ | 3 | 2 | 2.91 | 23 | 0 | 0 | 0 | 0 | 2 | 3 | 34.0 | 144 | 28 | 15 | 11 | 5 | 13 | 0 | 5 | 5 | 0 | 47 | |
| 2023 | SFG | AA | 0 | 0 | 5.40 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1.2 | 10 | 3 | 1 | 1 | 0 | 2 | 0 | 0 | 0 | 0 | 2 | |
| 2024 | Steamer Steamer | PROJ | 0 | 0 | 4.81 | 1 | 0 | 0 | 0 | 0 | 0 | 1.0 | 4 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | |||||
| 2024 | Steamer Steamer (RoS) | ROS | 0 | 0 | 4.55 | 1 | 0 | 0 | 0 | 0 | 0 | 1.0 | 4 | 1 | 1 | 1 | 0 | 0 | 0 | 1 |
Preseason ProjectionsIn-Season ProjectionsMinor LeaguesSpring TrainingAverages
| 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 | CPX | 13.50 | 5.40 | 2.50 | 0.00 | 33.3% | 13.3% | 20.0% | .308 | 1.80 | .500 | 83.3% | 3.06 | ||||||
| 2022 | SFG | A | 9.53 | 6.35 | 1.50 | 1.59 | 21.4% | 14.3% | 7.1% | .273 | 1.76 | .333 | 75.5% | 7.50 | ||||||
| 2023 | SFG | A | 9.67 | 5.00 | 1.93 | 0.00 | 23.4% | 12.1% | 11.3% | .202 | 1.33 | .280 | 56.1% | 4.18 | ||||||
| 2023 | SFG | A+ | 12.44 | 3.44 | 3.62 | 1.32 | 32.6% | 9.0% | 23.6% | .222 | 1.21 | .311 | 79.5% | 4.44 | ||||||
| 2023 | SFG | AA | 10.80 | 10.80 | 1.00 | 0.00 | 20.0% | 20.0% | 0.0% | .375 | 3.00 | .500 | 80.0% | 4.48 | ||||||
| 2024 | Steamer Steamer | PROJ | 7.71 | 4.16 | 1.86 | 1.23 | 19.2% | 10.4% | 8.9% | .258 | 1.48 | .298 | 70.4% | 4.88 | ||||||
| 2024 | Steamer Steamer (RoS) | ROS | 7.54 | 3.93 | 1.92 | 1.13 | 19.0% | 9.9% | 9.1% | .255 | 1.44 | .295 | 70.8% | 4.58 |
| 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 | CPX | 13.50 | 5.40 | 2.50 | 0.00 | 33.3% | 13.3% | 20.0% | .308 | 1.80 | .500 | 83.3% | 3.06 | ||||||
| 2022 | SFG | A | 9.53 | 6.35 | 1.50 | 1.59 | 21.4% | 14.3% | 7.1% | .273 | 1.76 | .333 | 75.5% | 7.50 | ||||||
| 2023 | SFG | A | 9.67 | 5.00 | 1.93 | 0.00 | 23.4% | 12.1% | 11.3% | .202 | 1.33 | .280 | 56.1% | 4.18 | ||||||
| 2023 | SFG | A+ | 12.44 | 3.44 | 3.62 | 1.32 | 32.6% | 9.0% | 23.6% | .222 | 1.21 | .311 | 79.5% | 4.44 | ||||||
| 2023 | SFG | AA | 10.80 | 10.80 | 1.00 | 0.00 | 20.0% | 20.0% | 0.0% | .375 | 3.00 | .500 | 80.0% | 4.48 | ||||||
| 2024 | Steamer Steamer | PROJ | 7.71 | 4.16 | 1.86 | 1.23 | 19.2% | 10.4% | 8.9% | .258 | 1.48 | .298 | 70.4% | 4.88 | ||||||
| 2024 | Steamer Steamer (RoS) | ROS | 7.54 | 3.93 | 1.92 | 1.13 | 19.0% | 9.9% | 9.1% | .255 | 1.44 | .295 | 70.8% | 4.58 |
