2026 Stats
W-L
0-0
ERA
0.00
WHIP
0.00
K
0
SV
0
Rest-of-Season Projections
Signed a minor-league contract with the Diamondbacks in December of 2025.
Misses out on Opening Day roster
The Diamondbacks reassigned Campbell to minor-league camp Thursday, Alex D'Agostino of SI.com reports.
Analysis
Plenty of spots in Arizona's Opening Day bullpen were up for grabs in spring training, but Campbell was unable to seize one despite allowing just two baserunners over five innings across six Cactus League appearances. Campbell saw big-league action in each of the past three seasons but is slated to begin the 2026 campaign at Triple-A Reno.
Plenty of spots in Arizona's Opening Day bullpen were up for grabs in spring training, but Campbell was unable to seize one despite allowing just two baserunners over five innings across six Cactus League appearances. Campbell saw big-league action in each of the past three seasons but is slated to begin the 2026 campaign at Triple-A Reno.
Pitching Stats
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Left/Right Pitching Splits
Since 2024
-20%
BAA vs RHP
2026
No Stats
| BAA | K | BB | H | HR | |
|---|---|---|---|---|---|
| Since 2024vs Left | .448 | 3 | 2 | 13 | 2 |
| Since 2024vs Right | .359 | 6 | 1 | 14 | 2 |
| 2026vs Left | 0 | 0 | 0 | 0 | 0 |
| 2026vs Right | 0 | 0 | 0 | 0 | 0 |
| 2025vs Left | .455 | 0 | 1 | 5 | 0 |
| 2025vs Right | .364 | 3 | 0 | 8 | 1 |
| 2024vs Left | .444 | 3 | 1 | 8 | 2 |
| 2024vs Right | .353 | 3 | 1 | 6 | 1 |
Home/Away Pitching Splits
Since 2024
-94%
ERA on Road
2026
No Stats
| ERA | WHIP | IP | K/9 | BB/9 | |
|---|---|---|---|---|---|
| Since 2024Home | 21.86 | 3.29 | 7.0 | 5.1 | 1.3 |
| Since 2024Away | 1.23 | 0.95 | 7.1 | 6.1 | 2.5 |
| 2026Home | 0 | 0 | 0 | 0 | 0 |
| 2026Away | 0 | 0 | 0 | 0 | 0 |
| 2025Home | 11.57 | 2.36 | 4.2 | 3.9 | 0.0 |
| 2025Away | 0.00 | 1.00 | 3.0 | 3.0 | 3.0 |
| 2024Home | 42.43 | 5.14 | 2.1 | 7.7 | 3.9 |
| 2024Away | 2.08 | 0.92 | 4.1 | 8.3 | 2.1 |
Minor League Left/Right Pitching Splits (AAA)
Since 2024
-5%
BAA vs LHP
2026
-100%
BAA vs LHP
| BAA | K | BB | H | HR | |
|---|---|---|---|---|---|
| Since 2024vs Left | .272 | 27 | 19 | 37 | 5 |
| Since 2024vs Right | .287 | 42 | 7 | 47 | 3 |
| 2026vs Left | .000 | 3 | 0 | 0 | 0 |
| 2026vs Right | .750 | 0 | 0 | 3 | 0 |
| 2025vs Left | .298 | 17 | 15 | 31 | 2 |
| 2025vs Right | .286 | 30 | 6 | 36 | 3 |
| 2024vs Left | .207 | 7 | 4 | 6 | 3 |
| 2024vs Right | .235 | 12 | 1 | 8 | 0 |
Stat Review
How does Isaiah Campbell compare to other relievers?
This section compares his stats with all relief pitcher seasons from the previous three seasons (minimum 30 innings)*. The bar represents the player's percentile rank. For example, if the bar is halfway across, then the player falls into the 50th percentile for that stat and it would be considered average.
* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
K/BB
3.00K/9
3.5BB/9
1.2HR/9
1.2Fastball
95.6 mphERA
7.04WHIP
1.83BABIP
.392GB/FB
4.75Left On Base
63.5%Exit Velocity
83.2 mphBarrels/BBE
2.3%Spin Rate
2685 rpmBalls Hit 95+ MPH
25.0%Swinging Strike
11.0%Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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2024 Fantasy Outlook
Campbell began the season with Double-A Arkansas. He had recorded a shiny 2.63 ERA and 1.04 WHIP in 24 innings, fanning 27 while issuing seven walks before being called up by the Mariners in early July. Campbell was quickly optioned back to Double-A, but it wasn't long before he was recalled, spending the duration of the season in the Seattle bullpen. The right-hander impressed with a 2.83 ERA and 1.22 WHIP with 33 punch outs in 28.2 stanzas. Dealing from an area of strength, the Mariners sent Campbell to the Red Sox for infielder Luis Urias. Campbell should be given a chance to break camp with a spot in the Red Sox bullpen. The 26-year-old has the stuff to be a late-inning reliever, but he'll have to work his way up the ladder, which could entail beginning the season with Triple-A Worcester.
More Fantasy News
Lands with Arizona on MiLB deal
The Diamondbacks signed Campbell to a minor-league contract Dec. 5.
Analysis
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Cleared from 40-man roster
The Red Sox outrighted Campbell to Triple-A Worcester on Thursday.
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Sent back to minors
The Red Sox optioned Campbell to Triple-A Worcester on Wednesday.
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Recalled from Triple-A
The Red Sox recalled Campbell from Triple-A Worcester on Tuesday.
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Quickly back to minors
Campbell was optioned to Triple-A Worcester on Thursday, Christopher Smith of MassLive.com reports.
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