Jefferson Jean
Athletics (A)P
Age: 20
Bats/Throws: R/R
6'3" / 170
DOB: 1/29/2005
(20 years, 4 months, 25 days)
P
Quick Links
More
Stats
Stat Groups:
Select
You can shift + click on full MLB seasons in Season Stats and games in Game Logs to select spans for aggregate stats. Read more here
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 | OAK | DSL | 17 | 0 | 0 | 0 | 6 | 6 | 7.1 | 11.05 | 4.91 | 0.00 | .278 | 63.6% | 66.7% | 0.0% | 4.91 | 3.81 | 4.19 | ||||||
| 2023 | OAK | CPX | 18 | 0 | 1 | 0 | 2 | 2 | 5.1 | 5.06 | 5.06 | 1.69 | .381 | 66.0% | 57.1% | 14.3% | 6.75 | 7.93 | 6.84 | ||||||
| 2024 | OAK | CPX | 19 | 0 | 0 | 0 | 5 | 3 | 18.1 | 16.20 | 6.87 | 0.98 | .303 | 78.5% | 48.5% | 15.4% | 2.95 | 4.97 | 4.22 | ||||||
| 2024 | OAK | A | 19 | 0 | 6 | 1 | 9 | 7 | 27.0 | 8.33 | 8.67 | 1.67 | .329 | 59.3% | 44.7% | 16.1% | 9.33 | 7.85 | 6.65 | ||||||
| 2024 | OAK | MiLB | 19 | 0 | 6 | 1 | 14 | 10 | 45.1 | 11.51 | 7.94 | 1.39 | .322 | 65.2% | 45.8% | 15.9% | 6.75 | 6.68 | 5.67 | ||||||
| 2025 | Steamer | PROJ | 20 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5.18 | 6.07 | 1.53 | .297 | 68.2% | 41.9% | 6.26 | 6.41 | 6.14 | 0.0 | ||||||
| 2025 | OOPSY | PROJ | 20 | 0 | 0 | 0 | 1 | 1 | 3.2 | 6.95 | 6.89 | 1.46 | .295 | 69.9% | 5.98 | 6.22 | 0.0 | ||||||||
| 2025 | OAK | A | 20 | 2 | 3 | 1 | 13 | 10 | 50.1 | 10.19 | 5.01 | 0.54 | .295 | 67.7% | 41.4% | 6.1% | 4.65 | 4.86 | 4.88 | ||||||
| 2025 | Steamer | ROS | 0 | 0 | 0 | 0 | 0 | 1.0 | 5.37 | 6.08 | 1.48 | .295 | 68.1% | 6.18 | 6.23 | 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 | OAK | DSL | 17 | 0 | 0 | 0 | 6 | 6 | 7.1 | 11.05 | 4.91 | 0.00 | .278 | 63.6% | 66.7% | 0.0% | 4.91 | 3.81 | 4.19 | ||||||
| 2023 | OAK | CPX | 18 | 0 | 1 | 0 | 2 | 2 | 5.1 | 5.06 | 5.06 | 1.69 | .381 | 66.0% | 57.1% | 14.3% | 6.75 | 7.93 | 6.84 | ||||||
| 2024 | OAK | CPX | 19 | 0 | 0 | 0 | 5 | 3 | 18.1 | 16.20 | 6.87 | 0.98 | .303 | 78.5% | 48.5% | 15.4% | 2.95 | 4.97 | 4.22 | ||||||
| 2024 | OAK | A | 19 | 0 | 6 | 1 | 9 | 7 | 27.0 | 8.33 | 8.67 | 1.67 | .329 | 59.3% | 44.7% | 16.1% | 9.33 | 7.85 | 6.65 | ||||||
| 2024 | OAK | MiLB | 19 | 0 | 6 | 1 | 14 | 10 | 45.1 | 11.51 | 7.94 | 1.39 | .322 | 65.2% | 45.8% | 15.9% | 6.75 | 6.68 | 5.67 | ||||||
| 2025 | Steamer | PROJ | 20 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5.18 | 6.07 | 1.53 | .297 | 68.2% | 41.9% | 6.26 | 6.41 | 6.14 | 0.0 | ||||||
| 2025 | OOPSY | PROJ | 20 | 0 | 0 | 0 | 1 | 1 | 3.2 | 6.95 | 6.89 | 1.46 | .295 | 69.9% | 5.98 | 6.22 | 0.0 | ||||||||
| 2025 | OAK | A | 20 | 2 | 3 | 1 | 13 | 10 | 50.1 | 10.19 | 5.01 | 0.54 | .295 | 67.7% | 41.4% | 6.1% | 4.65 | 4.86 | 4.88 | ||||||
| 2025 | Steamer | ROS | 0 | 0 | 0 | 0 | 0 | 1.0 | 5.37 | 6.08 | 1.48 | .295 | 68.1% | 6.18 | 6.23 | 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 | OAK | DSL | 0 | 0 | 4.91 | 6 | 6 | 0 | 0 | 0 | 0 | 0 | 7.1 | 33 | 5 | 4 | 4 | 0 | 4 | 0 | 2 | 0 | 0 | 9 | |
| 2023 | OAK | CPX | 0 | 1 | 6.75 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 5.1 | 28 | 9 | 5 | 4 | 1 | 3 | 0 | 0 | 1 | 2 | 3 | |
| 2024 | OAK | CPX | 0 | 0 | 2.95 | 5 | 3 | 0 | 0 | 0 | 1 | 0 | 18.1 | 83 | 12 | 8 | 6 | 2 | 14 | 0 | 1 | 5 | 0 | 33 | |
| 2024 | OAK | A | 0 | 6 | 9.33 | 9 | 7 | 0 | 0 | 1 | 0 | 0 | 27.0 | 141 | 32 | 29 | 28 | 5 | 26 | 0 | 3 | 5 | 0 | 25 | |
| 2024 | OAK | MiLB | 0 | 6 | 6.75 | 14 | 10 | 0 | 0 | 1 | 1 | 0 | 45.1 | 224 | 44 | 37 | 34 | 7 | 40 | 0 | 4 | 10 | 0 | 58 | |
| 2025 | Steamer | PROJ | 0 | 0 | 6.26 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | |||
| 2025 | OOPSY | PROJ | 0 | 0 | 5.98 | 1 | 1 | 0 | 0 | 0 | 3.2 | 16 | 4 | 2 | 2 | 1 | 2 | 0 | 0 | 2 | |||||
| 2025 | OAK | A | 2 | 3 | 4.65 | 13 | 10 | 0 | 0 | 1 | 0 | 0 | 50.1 | 229 | 41 | 29 | 26 | 3 | 28 | 0 | 12 | 8 | 1 | 57 | |
| 2025 | Steamer | ROS | 0 | 0 | 6.18 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5 | 1 | 1 | 1 | 0 | 1 | 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 | OAK | DSL | 0 | 0 | 4.91 | 6 | 6 | 0 | 0 | 0 | 0 | 0 | 7.1 | 33 | 5 | 4 | 4 | 0 | 4 | 0 | 2 | 0 | 0 | 9 | |
| 2023 | OAK | CPX | 0 | 1 | 6.75 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 5.1 | 28 | 9 | 5 | 4 | 1 | 3 | 0 | 0 | 1 | 2 | 3 | |
| 2024 | OAK | CPX | 0 | 0 | 2.95 | 5 | 3 | 0 | 0 | 0 | 1 | 0 | 18.1 | 83 | 12 | 8 | 6 | 2 | 14 | 0 | 1 | 5 | 0 | 33 | |
| 2024 | OAK | A | 0 | 6 | 9.33 | 9 | 7 | 0 | 0 | 1 | 0 | 0 | 27.0 | 141 | 32 | 29 | 28 | 5 | 26 | 0 | 3 | 5 | 0 | 25 | |
| 2024 | OAK | MiLB | 0 | 6 | 6.75 | 14 | 10 | 0 | 0 | 1 | 1 | 0 | 45.1 | 224 | 44 | 37 | 34 | 7 | 40 | 0 | 4 | 10 | 0 | 58 | |
| 2025 | Steamer | PROJ | 0 | 0 | 6.26 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | |||
| 2025 | OOPSY | PROJ | 0 | 0 | 5.98 | 1 | 1 | 0 | 0 | 0 | 3.2 | 16 | 4 | 2 | 2 | 1 | 2 | 0 | 0 | 2 | |||||
| 2025 | OAK | A | 2 | 3 | 4.65 | 13 | 10 | 0 | 0 | 1 | 0 | 0 | 50.1 | 229 | 41 | 29 | 26 | 3 | 28 | 0 | 12 | 8 | 1 | 57 | |
| 2025 | Steamer | ROS | 0 | 0 | 6.18 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5 | 1 | 1 | 1 | 0 | 1 | 0 | 1 |
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 | OAK | DSL | 11.05 | 4.91 | 2.25 | 0.00 | 27.3% | 12.1% | 15.2% | .185 | 1.23 | .278 | 63.6% | 113 | 85 | 3.81 | ||||
| 2023 | OAK | CPX | 5.06 | 5.06 | 1.00 | 1.69 | 10.7% | 10.7% | 0.0% | .360 | 2.25 | .381 | 66.0% | 116 | 142 | 7.93 | ||||
| 2024 | OAK | CPX | 16.20 | 6.87 | 2.36 | 0.98 | 39.8% | 16.9% | 22.9% | .176 | 1.42 | .303 | 78.5% | 54 | 94 | 4.97 | ||||
| 2024 | OAK | A | 8.33 | 8.67 | 0.96 | 1.67 | 17.7% | 18.4% | -0.7% | .286 | 2.15 | .329 | 59.3% | 187 | 156 | 7.85 | ||||
| 2024 | OAK | MiLB | 11.51 | 7.94 | 1.45 | 1.39 | 25.9% | 17.9% | 8.0% | .244 | 1.85 | .322 | 65.2% | 133 | 131 | 6.68 | ||||
| 2025 | Steamer | PROJ | 5.18 | 6.07 | 0.85 | 1.53 | 12.2% | 14.3% | -2.1% | .284 | 1.81 | .297 | 68.2% | 6.41 | ||||||
| 2025 | OOPSY | PROJ | 6.95 | 6.89 | 1.01 | 1.46 | 15.4% | 15.3% | 0.1% | .268 | 1.88 | .295 | 69.9% | 6.22 | ||||||
| 2025 | OAK | A | 10.19 | 5.01 | 2.04 | 0.54 | 24.9% | 12.2% | 12.7% | .217 | 1.37 | .295 | 67.7% | 101 | 104 | 4.86 | ||||
| 2025 | Steamer | ROS | 5.37 | 6.08 | 0.88 | 1.48 | 12.6% | 14.3% | -1.7% | .280 | 1.79 | .295 | 68.1% | 6.23 |
| 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 | OAK | DSL | 11.05 | 4.91 | 2.25 | 0.00 | 27.3% | 12.1% | 15.2% | .185 | 1.23 | .278 | 63.6% | 113 | 85 | 3.81 | ||||
| 2023 | OAK | CPX | 5.06 | 5.06 | 1.00 | 1.69 | 10.7% | 10.7% | 0.0% | .360 | 2.25 | .381 | 66.0% | 116 | 142 | 7.93 | ||||
| 2024 | OAK | CPX | 16.20 | 6.87 | 2.36 | 0.98 | 39.8% | 16.9% | 22.9% | .176 | 1.42 | .303 | 78.5% | 54 | 94 | 4.97 | ||||
| 2024 | OAK | A | 8.33 | 8.67 | 0.96 | 1.67 | 17.7% | 18.4% | -0.7% | .286 | 2.15 | .329 | 59.3% | 187 | 156 | 7.85 | ||||
| 2024 | OAK | MiLB | 11.51 | 7.94 | 1.45 | 1.39 | 25.9% | 17.9% | 8.0% | .244 | 1.85 | .322 | 65.2% | 133 | 131 | 6.68 | ||||
| 2025 | Steamer | PROJ | 5.18 | 6.07 | 0.85 | 1.53 | 12.2% | 14.3% | -2.1% | .284 | 1.81 | .297 | 68.2% | 6.41 | ||||||
| 2025 | OOPSY | PROJ | 6.95 | 6.89 | 1.01 | 1.46 | 15.4% | 15.3% | 0.1% | .268 | 1.88 | .295 | 69.9% | 6.22 | ||||||
| 2025 | OAK | A | 10.19 | 5.01 | 2.04 | 0.54 | 24.9% | 12.2% | 12.7% | .217 | 1.37 | .295 | 67.7% | 101 | 104 | 4.86 | ||||
| 2025 | Steamer | ROS | 5.37 | 6.08 | 0.88 | 1.48 | 12.6% | 14.3% | -1.7% | .280 | 1.79 | .295 | 68.1% | 6.23 |
