15-Day IL
Injury Pectoral
Est. Return 8/3/2026
2026 Stats
W-L
2-1
ERA
3.52
WHIP
1.17
K
23
SV
1
Rest-of-Season Projections
Signed a one-year contract with the Mariners in March of 2026.
Targeting early-August return
Criswell was diagnosed with a Grade 1-plus pectoral strain Tuesday, Daniel Kramer of MLB.com reports.
Analysis
Criswell initially landed on the injured list last Tuesday with a shoulder strain, but further testing determined the issue to be in his pec. He's scheduled to undergo another MRI in 3-to-4 weeks, at which point he may be cleared to begin a throwing program. If all goes according to plan, the Mariners expect to activate the 29-year-old reliever sometime around the Aug. 3 trade deadline.
Criswell initially landed on the injured list last Tuesday with a shoulder strain, but further testing determined the issue to be in his pec. He's scheduled to undergo another MRI in 3-to-4 weeks, at which point he may be cleared to begin a throwing program. If all goes according to plan, the Mariners expect to activate the 29-year-old reliever sometime around the Aug. 3 trade deadline.
Pitching Stats
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2026 MLB Game Log
2026
2025
2024
2023
2022
2021
Minor League Game Log
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Pitching Appearances Breakdown
Average Pitch Count
18
Last 10 Games
18
Last 5 Games
17
How many pitches does Cooper Criswell generally throw?
1-10
11-20
21-30
31-40
41-50
51-60
61-70
71-80
81-90
91-100
101-110
111-120
121+
What part of the game does Cooper Criswell generally pitch?
1st
2nd
3rd
4th
5th
6th
7th
8th
9th
Extra
% Games Reaching Innings Threshold
% Games By Number of Innings Pitched
Left/Right Pitching Splits
Since 2024
-9%
BAA vs LHP
2026
-19%
BAA vs LHP
| BAA | K | BB | H | HR | ||||
|---|---|---|---|---|---|---|---|---|
| Since 2024vs Left | .262 | 57 | 24 | 72 | 5 | |||
| Since 2024vs Right | .288 | 48 | 20 | 82 | 11 | |||
| 2026vs Left | .233 | 15 | 5 | 14 | 3 | |||
| 2026vs Right | .286 | 8 | 3 | 14 | 0 | |||
| 2025vs Left | .310 | 3 | 1 | 9 | 0 | |||
| 2025vs Right | .311 | 6 | 4 | 14 | 3 | |||
| 2024vs Left | .263 | 39 | 18 | 49 | 2 | |||
| 2024vs Right | .283 | 34 | 13 | 54 | 8 | |||
| More Splits→ | View More Split Stats | |||||||
Home/Away Pitching Splits
Since 2024
-16%
ERA at Home
2026
-66%
ERA at Home
| ERA | WHIP | IP | K/9 | BB/9 | |||||
|---|---|---|---|---|---|---|---|---|---|
| Since 2024Home | 3.59 | 1.28 | 80.1 | 6.5 | 2.7 | ||||
| Since 2024Away | 4.28 | 1.41 | 67.1 | 6.3 | 2.7 | ||||
| 2026Home | 1.96 | 0.87 | 18.1 | 8.3 | 1.5 | ||||
| 2026Away | 5.84 | 1.62 | 12.1 | 4.4 | 3.6 | ||||
| 2025Home | 3.95 | 1.54 | 13.2 | 4.6 | 2.6 | ||||
| 2025Away | 2.25 | 1.75 | 4.0 | 4.5 | 2.3 | ||||
| 2024Home | 4.10 | 1.37 | 48.1 | 6.3 | 3.2 | ||||
| 2024Away | 4.06 | 1.33 | 51.0 | 6.9 | 2.5 | ||||
| More Splits→ | View More Split Stats | ||||||||
Stat Review
How does Cooper Criswell 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
2.88K/9
6.8BB/9
2.3HR/9
0.9Fastball
91.1 mphERA
3.52WHIP
1.17BABIP
.283GB/FB
2.52Left On Base
72.3%Exit Velocity
81.2 mphBarrels/BBE
3.1%Spin Rate
2078 rpmBalls Hit 95+ MPH
22.2%Swinging Strike
9.7%Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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Past Fantasy Outlooks
2025
2024
Criswell did a little bit of everything for the Boston pitching staff in 2024. He worked out of the pen as well as in the rotation as injuries impacted the rotation. Peak Criswell was him throwing seven shutout innings at Coors Field near the end of July, which was one of the five starts in which he earned a win out of his 18 starts. The flip side was his effort against Baltimore, as he faced them twice and allowed 13 earned runs in 7.1 innings of work, which did a number on his overall ratios. Criswell has enough stuff to succeed at the big-league level but not enough stuff to be a set-it-and-forget-it type pitcher for fantasy managers. The righty had his issues against fellow righties last season (.283/.335/.476), but his cutter/changeup approach to lefties helped him hold that group to a .263/.332/.366 line on the season. Criswell is currently slated to compete for a final spot in the Boston rotation, but could go to the bullpen or to Triple-A to begin the season as well. His ceiling is a streaming option, particularly against lefty-heavy lineups.
More Fantasy News
Placed on injured list
The Mariners placed Criswell on the 15-day injured list Tuesday with a right shoulder strain.
Analysis
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Grabs three-inning save
Criswell earned the save in Sunday's 8-0 win over the Guardians, allowing two hits while striking out five over three scoreless innings.
Analysis
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Could open season in rotation
Criswell is competing for the final starting spot in Seattle's Opening Day rotation, per Daniel Kramer of MLB.com.
Analysis
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Bound for Seattle
The Mets traded Criswell to the Mariners on Friday in exchange for cash, Jorge Castillo of ESPN.com reports.
Analysis
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DFA'd by Mets
The Mets designated Criswell for assignment Wednesday, Anthony DiComo of MLB.com reports.
Analysis
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Latest Fantasy Rumors
Boston hoped to retain
After designating Criswell for assignment Thursday, the Red Sox hoped to retain him before he was claimed off waivers by the Mets, reports Chris Cotillo of MassLive.com.
Analysis
The Red Sox needed to clear some roster space after acquiring Johan Oviedo from the Pirates on Thursday, and Criswell was the roster casualty. The right-hander made just seven appearances in the big leagues during the 2025 regular season, giving up seven earned runs with a 9:5 K:BB over 17.2 innings. Criswell worked as a swingman for Boston in 2024 and fared adequately with a 4.08 ERA and 1.35 WHIP across 99.1 frames.
The Red Sox needed to clear some roster space after acquiring Johan Oviedo from the Pirates on Thursday, and Criswell was the roster casualty. The right-hander made just seven appearances in the big leagues during the 2025 regular season, giving up seven earned runs with a 9:5 K:BB over 17.2 innings. Criswell worked as a swingman for Boston in 2024 and fared adequately with a 4.08 ERA and 1.35 WHIP across 99.1 frames.