Chase Costello
Milwaukee Brewers (AA)P
Age: 26
Bats/Throws: R/R
6'4" / 215
DOB: 4/13/2000
(26 years, 4 months, 14 days)
P
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Preseason ProjectionsIn-Season ProjectionsMinor LeaguesSpring Training
| Season | Team | Level | Age | W | L | SV | G | GS | IP | divider | K/9 | BB/9 | HR/9 | BABIP | LOB% | GB% | HR/FB | divider | vFA | divider | ERA | xERA | FIP | xFIP | WAR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023 | MIL | A | 23 | 9 | 4 | 1 | 28 | 0 | 64.2 | 7.38 | 2.78 | 0.42 | .278 | 65.9% | 58.1% | 7.0% | 3.76 | 3.83 | 3.91 | ||||||
| 2024 | MIL | A+ | 24 | 6 | 3 | 4 | 34 | 0 | 42.1 | 12.12 | 3.19 | 0.64 | .363 | 70.1% | 44.2% | 9.4% | 3.83 | 2.87 | 2.78 | ||||||
| 2024 | MIL | AA | 24 | 1 | 0 | 0 | 3 | 0 | 6.0 | 9.00 | 6.00 | 0.00 | .077 | 100.0% | 61.5% | 0.0% | 0.00 | 3.31 | 3.86 | ||||||
| 2024 | MIL | MiLB | 24 | 7 | 3 | 4 | 37 | 0 | 48.1 | 11.73 | 3.54 | 0.56 | .330 | 72.7% | 46.2% | 8.6% | 3.35 | 2.93 | 2.92 | ||||||
| 2025 | MIL | AA | 25 | 0 | 0 | 1 | 13 | 0 | 15.1 | 7.04 | 5.87 | 0.00 | .420 | 72.7% | 57.4% | 0.0% | 5.28 | 3.97 | 4.67 | ||||||
| 2025 | MIL | ST | 25 | 0 | 0 | 0 | 3 | 0 | 2.0 | 13.50 | 4.50 | 0.00 | .000 | 100.0% | 66.7% | 0.0% | 0.00 | 2.23 | 3.12 | ||||||
| 2026 | Steamer | PROJ | 26 | 0 | 0 | 0 | 1 | 0 | 1.0 | 7.09 | 3.97 | 1.15 | .298 | 71.7% | 46.1% | 4.52 | 4.69 | 4.64 | 0.0 | ||||||
| 2026 | ZiPS | PROJ | 26 | 3 | 3 | 0 | 24 | 0 | 34.0 | 6.88 | 3.97 | 1.32 | .288 | 67.4% | 5.03 | 5.11 | -0.3 | ||||||||
| 2026 | OOPSY | PROJ | 26 | 0 | 0 | 0 | 1 | 0 | 1.6 | 6.10 | 4.23 | 1.18 | .283 | 67.2% | 4.93 | 5.05 | 0.0 | ||||||||
| 2026 | Steamer | ROS | 26 | 0 | 0 | 0 | 1 | 0 | 1.0 | 7.03 | 4.21 | 1.17 | .297 | 71.7% | 4.61 | 4.76 | 0.0 |
| Season | Team | Level | Age | W | L | SV | G | GS | IP | divider | K/9 | BB/9 | HR/9 | BABIP | LOB% | GB% | HR/FB | divider | vFA | divider | ERA | xERA | FIP | xFIP | WAR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023 | MIL | A | 23 | 9 | 4 | 1 | 28 | 0 | 64.2 | 7.38 | 2.78 | 0.42 | .278 | 65.9% | 58.1% | 7.0% | 3.76 | 3.83 | 3.91 | ||||||
| 2024 | MIL | A+ | 24 | 6 | 3 | 4 | 34 | 0 | 42.1 | 12.12 | 3.19 | 0.64 | .363 | 70.1% | 44.2% | 9.4% | 3.83 | 2.87 | 2.78 | ||||||
| 2024 | MIL | AA | 24 | 1 | 0 | 0 | 3 | 0 | 6.0 | 9.00 | 6.00 | 0.00 | .077 | 100.0% | 61.5% | 0.0% | 0.00 | 3.31 | 3.86 | ||||||
| 2024 | MIL | MiLB | 24 | 7 | 3 | 4 | 37 | 0 | 48.1 | 11.73 | 3.54 | 0.56 | .330 | 72.7% | 46.2% | 8.6% | 3.35 | 2.93 | 2.92 | ||||||
| 2025 | MIL | AA | 25 | 0 | 0 | 1 | 13 | 0 | 15.1 | 7.04 | 5.87 | 0.00 | .420 | 72.7% | 57.4% | 0.0% | 5.28 | 3.97 | 4.67 | ||||||
| 2025 | MIL | ST | 25 | 0 | 0 | 0 | 3 | 0 | 2.0 | 13.50 | 4.50 | 0.00 | .000 | 100.0% | 66.7% | 0.0% | 0.00 | 2.23 | 3.12 | ||||||
| 2026 | Steamer | PROJ | 26 | 0 | 0 | 0 | 1 | 0 | 1.0 | 7.09 | 3.97 | 1.15 | .298 | 71.7% | 46.1% | 4.52 | 4.69 | 4.64 | 0.0 | ||||||
| 2026 | ZiPS | PROJ | 26 | 3 | 3 | 0 | 24 | 0 | 34.0 | 6.88 | 3.97 | 1.32 | .288 | 67.4% | 5.03 | 5.11 | -0.3 | ||||||||
| 2026 | OOPSY | PROJ | 26 | 0 | 0 | 0 | 1 | 0 | 1.6 | 6.10 | 4.23 | 1.18 | .283 | 67.2% | 4.93 | 5.05 | 0.0 | ||||||||
| 2026 | Steamer | ROS | 26 | 0 | 0 | 0 | 1 | 0 | 1.0 | 7.03 | 4.21 | 1.17 | .297 | 71.7% | 4.61 | 4.76 | 0.0 |
Preseason ProjectionsIn-Season ProjectionsMinor LeaguesSpring Training
| Season | Team | Level | W | L | ERA | G | GS | QS | CG | ShO | SV | HLD | BS | IP | TBF | H | R | ER | HR | BB | IBB | HBP | WP | BK | SO |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023 | MIL | A | 9 | 4 | 3.76 | 28 | 0 | 0 | 0 | 1 | 3 | 2 | 64.2 | 257 | 52 | 29 | 27 | 3 | 20 | 0 | 5 | 7 | 0 | 53 | |
| 2024 | MIL | A+ | 6 | 3 | 3.83 | 34 | 0 | 0 | 0 | 4 | 5 | 4 | 42.1 | 179 | 40 | 20 | 18 | 3 | 15 | 1 | 2 | 4 | 0 | 57 | |
| 2024 | MIL | AA | 1 | 0 | 0.00 | 3 | 0 | 0 | 0 | 0 | 1 | 0 | 6.0 | 23 | 1 | 0 | 0 | 0 | 4 | 0 | 0 | 1 | 0 | 6 | |
| 2024 | MIL | MiLB | 7 | 3 | 3.35 | 37 | 0 | 0 | 0 | 4 | 6 | 4 | 48.1 | 202 | 41 | 20 | 18 | 3 | 19 | 1 | 2 | 5 | 0 | 63 | |
| 2025 | MIL | AA | 0 | 0 | 5.28 | 13 | 0 | 0 | 0 | 1 | 2 | 0 | 15.1 | 74 | 21 | 9 | 9 | 0 | 10 | 0 | 2 | 1 | 1 | 12 | |
| 2025 | MIL | ST | 0 | 0 | 0.00 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 2.0 | 7 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 3 | |
| 2026 | Steamer | PROJ | 0 | 0 | 4.52 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 4 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | |||
| 2026 | ZiPS | PROJ | 3 | 3 | 5.03 | 24 | 0 | 0 | 0 | 34.0 | 153 | 35 | 21 | 19 | 5 | 15 | 0 | 3 | 3 | 0 | 26 | ||||
| 2026 | OOPSY | PROJ | 0 | 0 | 4.93 | 1 | 0 | 0 | 0 | 0 | 1.6 | 7 | 2 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | |||||
| 2026 | Steamer | ROS | 0 | 0 | 4.61 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 4 | 1 | 1 | 1 | 0 | 0 | 0 | 1 |
| Season | Team | Level | W | L | ERA | G | GS | QS | CG | ShO | SV | HLD | BS | IP | TBF | H | R | ER | HR | BB | IBB | HBP | WP | BK | SO |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023 | MIL | A | 9 | 4 | 3.76 | 28 | 0 | 0 | 0 | 1 | 3 | 2 | 64.2 | 257 | 52 | 29 | 27 | 3 | 20 | 0 | 5 | 7 | 0 | 53 | |
| 2024 | MIL | A+ | 6 | 3 | 3.83 | 34 | 0 | 0 | 0 | 4 | 5 | 4 | 42.1 | 179 | 40 | 20 | 18 | 3 | 15 | 1 | 2 | 4 | 0 | 57 | |
| 2024 | MIL | AA | 1 | 0 | 0.00 | 3 | 0 | 0 | 0 | 0 | 1 | 0 | 6.0 | 23 | 1 | 0 | 0 | 0 | 4 | 0 | 0 | 1 | 0 | 6 | |
| 2024 | MIL | MiLB | 7 | 3 | 3.35 | 37 | 0 | 0 | 0 | 4 | 6 | 4 | 48.1 | 202 | 41 | 20 | 18 | 3 | 19 | 1 | 2 | 5 | 0 | 63 | |
| 2025 | MIL | AA | 0 | 0 | 5.28 | 13 | 0 | 0 | 0 | 1 | 2 | 0 | 15.1 | 74 | 21 | 9 | 9 | 0 | 10 | 0 | 2 | 1 | 1 | 12 | |
| 2025 | MIL | ST | 0 | 0 | 0.00 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 2.0 | 7 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 3 | |
| 2026 | Steamer | PROJ | 0 | 0 | 4.52 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 4 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | |||
| 2026 | ZiPS | PROJ | 3 | 3 | 5.03 | 24 | 0 | 0 | 0 | 34.0 | 153 | 35 | 21 | 19 | 5 | 15 | 0 | 3 | 3 | 0 | 26 | ||||
| 2026 | OOPSY | PROJ | 0 | 0 | 4.93 | 1 | 0 | 0 | 0 | 0 | 1.6 | 7 | 2 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | |||||
| 2026 | Steamer | ROS | 0 | 0 | 4.61 | 1 | 0 | 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 | BB/9 | K/BB | HR/9 | divider | K% | BB% | K-BB% | divider | AVG | WHIP | BABIP | LOB% | divider | ERA- | FIP- | divider | FIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023 | MIL | A | 7.38 | 2.78 | 2.65 | 0.42 | 20.6% | 7.8% | 12.8% | .224 | 1.11 | .278 | 65.9% | 87 | 92 | 3.83 | ||||
| 2024 | MIL | A+ | 12.12 | 3.19 | 3.80 | 0.64 | 31.8% | 8.4% | 23.5% | .247 | 1.30 | .363 | 70.1% | 94 | 71 | 2.87 | ||||
| 2024 | MIL | AA | 9.00 | 6.00 | 1.50 | 0.00 | 26.1% | 17.4% | 8.7% | .053 | 0.83 | .077 | 100.0% | 0 | 85 | 3.31 | ||||
| 2024 | MIL | MiLB | 11.73 | 3.54 | 3.32 | 0.56 | 31.2% | 9.4% | 21.8% | .227 | 1.24 | .330 | 72.7% | 82 | 72 | 2.93 | ||||
| 2025 | MIL | AA | 7.04 | 5.87 | 1.20 | 0.00 | 16.2% | 13.5% | 2.7% | .339 | 2.02 | .420 | 72.7% | 140 | 103 | 3.97 | ||||
| 2025 | MIL | ST | 13.50 | 4.50 | 3.00 | 0.00 | 42.9% | 14.3% | 28.6% | .000 | 0.50 | .000 | 100.0% | 0 | 43 | 2.23 | ||||
| 2026 | Steamer | PROJ | 7.09 | 3.97 | 1.79 | 1.15 | 17.9% | 10.0% | 7.9% | .261 | 1.46 | .298 | 71.7% | 4.69 | ||||||
| 2026 | ZiPS | PROJ | 6.88 | 3.97 | 1.73 | 1.32 | 17.0% | 9.8% | 7.2% | .259 | 1.47 | .288 | 67.4% | 5.11 | ||||||
| 2026 | OOPSY | PROJ | 6.10 | 4.23 | 1.44 | 1.18 | 15.7% | 10.9% | 4.8% | .257 | 1.45 | .283 | 67.2% | 5.05 | ||||||
| 2026 | Steamer | ROS | 7.03 | 4.21 | 1.67 | 1.17 | 17.6% | 10.6% | 7.1% | .261 | 1.49 | .297 | 71.7% | 4.76 |
| Season | Team | Level | K/9 | BB/9 | K/BB | HR/9 | divider | K% | BB% | K-BB% | divider | AVG | WHIP | BABIP | LOB% | divider | ERA- | FIP- | divider | FIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023 | MIL | A | 7.38 | 2.78 | 2.65 | 0.42 | 20.6% | 7.8% | 12.8% | .224 | 1.11 | .278 | 65.9% | 87 | 92 | 3.83 | ||||
| 2024 | MIL | A+ | 12.12 | 3.19 | 3.80 | 0.64 | 31.8% | 8.4% | 23.5% | .247 | 1.30 | .363 | 70.1% | 94 | 71 | 2.87 | ||||
| 2024 | MIL | AA | 9.00 | 6.00 | 1.50 | 0.00 | 26.1% | 17.4% | 8.7% | .053 | 0.83 | .077 | 100.0% | 0 | 85 | 3.31 | ||||
| 2024 | MIL | MiLB | 11.73 | 3.54 | 3.32 | 0.56 | 31.2% | 9.4% | 21.8% | .227 | 1.24 | .330 | 72.7% | 82 | 72 | 2.93 | ||||
| 2025 | MIL | AA | 7.04 | 5.87 | 1.20 | 0.00 | 16.2% | 13.5% | 2.7% | .339 | 2.02 | .420 | 72.7% | 140 | 103 | 3.97 | ||||
| 2025 | MIL | ST | 13.50 | 4.50 | 3.00 | 0.00 | 42.9% | 14.3% | 28.6% | .000 | 0.50 | .000 | 100.0% | 0 | 43 | 2.23 | ||||
| 2026 | Steamer | PROJ | 7.09 | 3.97 | 1.79 | 1.15 | 17.9% | 10.0% | 7.9% | .261 | 1.46 | .298 | 71.7% | 4.69 | ||||||
| 2026 | ZiPS | PROJ | 6.88 | 3.97 | 1.73 | 1.32 | 17.0% | 9.8% | 7.2% | .259 | 1.47 | .288 | 67.4% | 5.11 | ||||||
| 2026 | OOPSY | PROJ | 6.10 | 4.23 | 1.44 | 1.18 | 15.7% | 10.9% | 4.8% | .257 | 1.45 | .283 | 67.2% | 5.05 | ||||||
| 2026 | Steamer | ROS | 7.03 | 4.21 | 1.67 | 1.17 | 17.6% | 10.6% | 7.1% | .261 | 1.49 | .297 | 71.7% | 4.76 |
Preseason ProjectionsIn-Season ProjectionsMinor LeaguesSpring Training
| Season | Team | Level | Age | divider | W | L | G | GS | IP | divider | H | R | ER | HR | BB | SO | divider | K/9 | BB/9 | K/BB | HR/9 | divider | AVG | WHIP | BABIP | LOB% | divider | ERA | FIP | WAR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | ZiPS | PROJ | 26 | 3 | 3 | 24 | 0 | 34.0 | 35 | 21 | 19 | 5 | 15 | 26 | 6.88 | 3.97 | 1.73 | 1.32 | .259 | 1.47 | .288 | 67.4% | 5.03 | 5.11 | -0.3 | |||||
| 2027 | ZiPS | PROJ | 27 | 3 | 4 | 27 | 0 | 38.3 | 38 | 21 | 20 | 5 | 16 | 29 | 6.81 | 3.76 | 1.81 | 1.17 | .253 | 1.41 | .284 | 70.2% | 4.70 | 4.81 | -0.2 | |||||
| 2028 | ZiPS | PROJ | 28 | 3 | 4 | 29 | 0 | 42.0 | 40 | 24 | 22 | 5 | 18 | 32 | 6.86 | 3.86 | 1.78 | 1.07 | .247 | 1.38 | .280 | 66.7% | 4.71 | 4.66 | -0.1 |
| Season | Team | Level | Age | divider | W | L | G | GS | IP | divider | H | R | ER | HR | BB | SO | divider | K/9 | BB/9 | K/BB | HR/9 | divider | AVG | WHIP | BABIP | LOB% | divider | ERA | FIP | WAR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | ZiPS | PROJ | 26 | 3 | 3 | 24 | 0 | 34.0 | 35 | 21 | 19 | 5 | 15 | 26 | 6.88 | 3.97 | 1.73 | 1.32 | .259 | 1.47 | .288 | 67.4% | 5.03 | 5.11 | -0.3 | |||||
| 2027 | ZiPS | PROJ | 27 | 3 | 4 | 27 | 0 | 38.3 | 38 | 21 | 20 | 5 | 16 | 29 | 6.81 | 3.76 | 1.81 | 1.17 | .253 | 1.41 | .284 | 70.2% | 4.70 | 4.81 | -0.2 | |||||
| 2028 | ZiPS | PROJ | 28 | 3 | 4 | 29 | 0 | 42.0 | 40 | 24 | 22 | 5 | 18 | 32 | 6.86 | 3.86 | 1.78 | 1.07 | .247 | 1.38 | .280 | 66.7% | 4.71 | 4.66 | -0.1 |
