Eybersson Polanco
Boston Red Sox (A)P
Age: 21
Bats/Throws: R/R
6'0" / 170
DOB: 9/3/2003
(21 years, 9 months, 17 days)
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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 | BOS | DSL | 18 | 2 | 1 | 0 | 12 | 12 | 50.2 | 8.88 | 3.02 | 0.00 | .248 | 80.0% | 45.1% | 0.0% | 1.78 | 2.96 | 3.55 | ||||||
| 2023 | BOS | CPX | 19 | 0 | 2 | 0 | 8 | 7 | 32.0 | 6.19 | 4.22 | 0.84 | .330 | 64.3% | 38.0% | 7.1% | 5.06 | 5.48 | 5.60 | ||||||
| 2025 | Steamer | PROJ | 21 | 0 | 0 | 0 | 0 | 0 | 1.0 | 3.98 | 6.43 | 1.67 | .306 | 65.4% | 41.4% | 7.23 | 6.98 | 6.66 | 0.0 | ||||||
| 2025 | OOPSY | PROJ | 21 | 0 | 0 | 0 | 1 | 1 | 4.0 | 3.59 | 4.35 | 1.67 | .312 | 58.9% | 7.06 | 6.38 | 0.0 | ||||||||
| 2025 | BOS | A | 21 | 2 | 1 | 1 | 17 | 0 | 31.0 | 10.16 | 4.94 | 0.29 | .294 | 54.0% | 54.9% | 5.0% | 4.35 | 3.53 | 3.68 | ||||||
| 2025 | Steamer | ROS | 0 | 0 | 0 | 1 | 0 | 1.0 | 5.56 | 6.21 | 1.26 | .306 | 68.6% | 5.94 | 5.85 | 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 | BOS | DSL | 18 | 2 | 1 | 0 | 12 | 12 | 50.2 | 8.88 | 3.02 | 0.00 | .248 | 80.0% | 45.1% | 0.0% | 1.78 | 2.96 | 3.55 | ||||||
| 2023 | BOS | CPX | 19 | 0 | 2 | 0 | 8 | 7 | 32.0 | 6.19 | 4.22 | 0.84 | .330 | 64.3% | 38.0% | 7.1% | 5.06 | 5.48 | 5.60 | ||||||
| 2025 | Steamer | PROJ | 21 | 0 | 0 | 0 | 0 | 0 | 1.0 | 3.98 | 6.43 | 1.67 | .306 | 65.4% | 41.4% | 7.23 | 6.98 | 6.66 | 0.0 | ||||||
| 2025 | OOPSY | PROJ | 21 | 0 | 0 | 0 | 1 | 1 | 4.0 | 3.59 | 4.35 | 1.67 | .312 | 58.9% | 7.06 | 6.38 | 0.0 | ||||||||
| 2025 | BOS | A | 21 | 2 | 1 | 1 | 17 | 0 | 31.0 | 10.16 | 4.94 | 0.29 | .294 | 54.0% | 54.9% | 5.0% | 4.35 | 3.53 | 3.68 | ||||||
| 2025 | Steamer | ROS | 0 | 0 | 0 | 1 | 0 | 1.0 | 5.56 | 6.21 | 1.26 | .306 | 68.6% | 5.94 | 5.85 | 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 | BOS | DSL | 2 | 1 | 1.78 | 12 | 12 | 0 | 0 | 0 | 0 | 0 | 50.2 | 194 | 31 | 10 | 10 | 0 | 17 | 0 | 2 | 4 | 0 | 50 | |
| 2023 | BOS | CPX | 0 | 2 | 5.06 | 8 | 7 | 0 | 0 | 0 | 0 | 0 | 32.0 | 143 | 36 | 22 | 18 | 3 | 15 | 0 | 3 | 4 | 0 | 22 | |
| 2025 | Steamer | PROJ | 0 | 0 | 7.23 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | |||
| 2025 | OOPSY | PROJ | 0 | 0 | 7.06 | 1 | 1 | 0 | 0 | 0 | 4.0 | 18 | 5 | 3 | 3 | 1 | 2 | 0 | 0 | 2 | |||||
| 2025 | BOS | A | 2 | 1 | 4.35 | 17 | 0 | 0 | 0 | 1 | 1 | 1 | 31.0 | 139 | 26 | 21 | 15 | 1 | 17 | 0 | 1 | 2 | 0 | 35 | |
| 2025 | Steamer | ROS | 0 | 0 | 5.94 | 1 | 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 | BOS | DSL | 2 | 1 | 1.78 | 12 | 12 | 0 | 0 | 0 | 0 | 0 | 50.2 | 194 | 31 | 10 | 10 | 0 | 17 | 0 | 2 | 4 | 0 | 50 | |
| 2023 | BOS | CPX | 0 | 2 | 5.06 | 8 | 7 | 0 | 0 | 0 | 0 | 0 | 32.0 | 143 | 36 | 22 | 18 | 3 | 15 | 0 | 3 | 4 | 0 | 22 | |
| 2025 | Steamer | PROJ | 0 | 0 | 7.23 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 5 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | |||
| 2025 | OOPSY | PROJ | 0 | 0 | 7.06 | 1 | 1 | 0 | 0 | 0 | 4.0 | 18 | 5 | 3 | 3 | 1 | 2 | 0 | 0 | 2 | |||||
| 2025 | BOS | A | 2 | 1 | 4.35 | 17 | 0 | 0 | 0 | 1 | 1 | 1 | 31.0 | 139 | 26 | 21 | 15 | 1 | 17 | 0 | 1 | 2 | 0 | 35 | |
| 2025 | Steamer | ROS | 0 | 0 | 5.94 | 1 | 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 | BOS | DSL | 8.88 | 3.02 | 2.94 | 0.00 | 25.8% | 8.8% | 17.0% | .177 | 0.95 | .248 | 80.0% | 40 | 65 | 2.96 | ||||
| 2023 | BOS | CPX | 6.19 | 4.22 | 1.47 | 0.84 | 15.4% | 10.5% | 4.9% | .288 | 1.59 | .330 | 64.3% | 91 | 105 | 5.48 | ||||
| 2025 | Steamer | PROJ | 3.98 | 6.43 | 0.62 | 1.67 | 9.1% | 14.7% | -5.6% | .304 | 1.96 | .306 | 65.4% | 6.98 | ||||||
| 2025 | OOPSY | PROJ | 3.59 | 4.35 | 0.83 | 1.67 | 8.9% | 10.8% | -1.9% | .312 | 1.71 | .312 | 58.9% | 6.38 | ||||||
| 2025 | BOS | A | 10.16 | 4.94 | 2.06 | 0.29 | 25.2% | 12.2% | 12.9% | .215 | 1.39 | .294 | 54.0% | 99 | 84 | 3.53 | ||||
| 2025 | Steamer | ROS | 5.56 | 6.21 | 0.90 | 1.26 | 13.1% | 14.6% | -1.5% | .283 | 1.82 | .306 | 68.6% | 5.85 |
| 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 | BOS | DSL | 8.88 | 3.02 | 2.94 | 0.00 | 25.8% | 8.8% | 17.0% | .177 | 0.95 | .248 | 80.0% | 40 | 65 | 2.96 | ||||
| 2023 | BOS | CPX | 6.19 | 4.22 | 1.47 | 0.84 | 15.4% | 10.5% | 4.9% | .288 | 1.59 | .330 | 64.3% | 91 | 105 | 5.48 | ||||
| 2025 | Steamer | PROJ | 3.98 | 6.43 | 0.62 | 1.67 | 9.1% | 14.7% | -5.6% | .304 | 1.96 | .306 | 65.4% | 6.98 | ||||||
| 2025 | OOPSY | PROJ | 3.59 | 4.35 | 0.83 | 1.67 | 8.9% | 10.8% | -1.9% | .312 | 1.71 | .312 | 58.9% | 6.38 | ||||||
| 2025 | BOS | A | 10.16 | 4.94 | 2.06 | 0.29 | 25.2% | 12.2% | 12.9% | .215 | 1.39 | .294 | 54.0% | 99 | 84 | 3.53 | ||||
| 2025 | Steamer | ROS | 5.56 | 6.21 | 0.90 | 1.26 | 13.1% | 14.6% | -1.5% | .283 | 1.82 | .306 | 68.6% | 5.85 |
