JB Middleton
Colorado Rockies (A)P
Age: 22
Bats/Throws: R/R
6'0" / 178
DOB: 11/24/2003
(22 years, 11 months, 12 days)
P
Player Dashboard:
Report: 2026 Updated
Org Rk
Ovr Rk
ETA
FV
30
N/A
2028
40
Fastball
45 / 50
Slider
45 / 50
Curveball
40 / 45
Changeup
50 / 60
Command
40 / 50
RosterResource
| How Acquired: | Draft |
| Draft: | 2025, Rd: 2, Pick: 2, Ovr: 45 |
| Draft Team: | Colorado Rockies |
| Signing Bonus: | $2,071,900 |
| College: | Southern Mississippi (Hattiesburg, USA) |
Rule 5 Eligible
Dec'28
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FG
RG
Show
Report: 2026 Updated
Org Rk
Ovr Rk
ETA
FV
30
N/A
2028
40
Fastball
45 / 50
Slider
45 / 50
Curveball
40 / 45
Changeup
50 / 60
Command
40 / 50
RosterResource
| How Acquired: | Draft |
| Draft: | 2025, Rd: 2, Pick: 2, Ovr: 45 |
| Draft Team: | Colorado Rockies |
| Signing Bonus: | $2,071,900 |
| College: | Southern Mississippi (Hattiesburg, USA) |
Rule 5 Eligible
Dec'28
News Settings
Article Source
All
FG
RG
Show
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Preseason ProjectionsMinor LeaguesCollege
| 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 | USM | NCAA | 19 | 0 | 3 | 0 | 8 | 1 | 9.1 | 10.61 | 3.86 | 2.89 | .304 | 54.7% | 8.68 | 8.26 | |||||||||
| 2024 | USM | NCAA | 20 | 2 | 1 | 2 | 24 | 2 | 37.1 | 10.85 | 6.03 | 0.72 | .297 | 68.8% | 4.34 | 4.82 | |||||||||
| 2025 | USM | NCAA | 21 | 10 | 1 | 0 | 16 | 16 | 105.1 | 10.42 | 2.14 | 0.68 | .229 | 81.3% | 2.31 | 3.56 | |||||||||
| 2026 | COL | A | 22 | 0 | 0 | 0 | 5 | 5 | 20.0 | 8.10 | 5.85 | 1.35 | .321 | 79.3% | 59.3% | 25.0% | 4.95 | 6.96 | 5.99 | ||||||
| 2027 | Steamer | PROJ | 23 | 0 | 0 | 0 | 0 | 0 | 1.0 | 4.85 | 5.49 | 1.62 | .319 | 65.7% | 44.2% | 6.88 | 6.35 | 5.86 | 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 | USM | NCAA | 19 | 0 | 3 | 0 | 8 | 1 | 9.1 | 10.61 | 3.86 | 2.89 | .304 | 54.7% | 8.68 | 8.26 | |||||||||
| 2024 | USM | NCAA | 20 | 2 | 1 | 2 | 24 | 2 | 37.1 | 10.85 | 6.03 | 0.72 | .297 | 68.8% | 4.34 | 4.82 | |||||||||
| 2025 | USM | NCAA | 21 | 10 | 1 | 0 | 16 | 16 | 105.1 | 10.42 | 2.14 | 0.68 | .229 | 81.3% | 2.31 | 3.56 | |||||||||
| 2026 | COL | A | 22 | 0 | 0 | 0 | 5 | 5 | 20.0 | 8.10 | 5.85 | 1.35 | .321 | 79.3% | 59.3% | 25.0% | 4.95 | 6.96 | 5.99 | ||||||
| 2027 | Steamer | PROJ | 23 | 0 | 0 | 0 | 0 | 0 | 1.0 | 4.85 | 5.49 | 1.62 | .319 | 65.7% | 44.2% | 6.88 | 6.35 | 5.86 | 0.0 |
Preseason ProjectionsMinor LeaguesCollege
Preseason ProjectionsMinor LeaguesAveragesCollege
| 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 | USM | NCAA | 10.61 | 3.86 | 2.75 | 2.89 | 25.0% | 9.1% | 15.9% | .270 | 1.50 | .304 | 54.7% | 142 | 135 | 8.26 | ||||
| 2024 | USM | NCAA | 10.85 | 6.03 | 1.80 | 0.72 | 26.9% | 15.0% | 12.0% | .216 | 1.47 | .297 | 68.8% | 76 | 84 | 4.82 | ||||
| 2025 | USM | NCAA | 10.42 | 2.14 | 4.88 | 0.68 | 29.4% | 6.0% | 23.4% | .172 | 0.85 | .229 | 81.3% | 42 | 66 | 3.56 | ||||
| 2026 | COL | A | 8.10 | 5.85 | 1.38 | 1.35 | 19.4% | 14.0% | 5.4% | .273 | 1.70 | .321 | 79.3% | 91 | 125 | 6.96 | ||||
| 2027 | Steamer | PROJ | 4.85 | 5.49 | 0.88 | 1.62 | 11.3% | 12.7% | -1.5% | .307 | 1.88 | .319 | 65.7% | 6.35 |
| 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 | USM | NCAA | 10.61 | 3.86 | 2.75 | 2.89 | 25.0% | 9.1% | 15.9% | .270 | 1.50 | .304 | 54.7% | 142 | 135 | 8.26 | ||||
| 2024 | USM | NCAA | 10.85 | 6.03 | 1.80 | 0.72 | 26.9% | 15.0% | 12.0% | .216 | 1.47 | .297 | 68.8% | 76 | 84 | 4.82 | ||||
| 2025 | USM | NCAA | 10.42 | 2.14 | 4.88 | 0.68 | 29.4% | 6.0% | 23.4% | .172 | 0.85 | .229 | 81.3% | 42 | 66 | 3.56 | ||||
| 2026 | COL | A | 8.10 | 5.85 | 1.38 | 1.35 | 19.4% | 14.0% | 5.4% | .273 | 1.70 | .321 | 79.3% | 91 | 125 | 6.96 | ||||
| 2027 | Steamer | PROJ | 4.85 | 5.49 | 0.88 | 1.62 | 11.3% | 12.7% | -1.5% | .307 | 1.88 | .319 | 65.7% | 6.35 |
Preseason ProjectionsMinor LeaguesCollege
Preseason ProjectionsMinor LeaguesCollege
MLB F-Strike%, SwStr%, CStr%, CSW% are from the Sports Info Solution data source.
All MiLB and Pace data are from Statcast.
All MiLB and Pace data are from Statcast.
Preseason ProjectionsMinor LeaguesAveragesCollege
