Cooper Criswell

RP · R/R · age 30.1 · SEA

OUT OF OPTIONSXX-DSUPER TWOOCTOBER OK

Roster status
ACTIVE
Service thru 2025
1+143
Service now / projected
2+143 / 2+143
Option years left (2026)
0
Assignments left this season
n/a of 5
Contract (2027)
SALARY ARBITRATION ELIGIBLE ("SUPER TWO")
Acquired
Purchased (NYM) Jan'26
Outrighted / DFA'd before
1 / 4
Contract
1 yr, $800k (2026)

Next 90 days, by the model

Stays put
67%
Designated
23%
Optioned
1%
Traded
8%
Released or non-tendered
1%

Pushing the cut risk up: age (30.14) raises it, this season's WAR (0.20) raises it, option years used (4) raises it.

Context the model does not weigh: ZiPS projects 0.8 WAR, 0.2 WAR this season; 15 RP on the 40-man, of whom Hoby Milner is headed to free agency.

Trained on every 40-man roster snapshot since 2011 and what happened in the following 90 days; it sees roster status, options, service, history and last season's line, not this season's performance or the club's intentions. How well it does.

Is there a job for him next year?

SEA returns 14 RP on the 40-man once 1 free agent leaves; about 9 RP jobs survive a normal winter. By his own recent record he ranks 5th among the returners (0.6 WAR against a bar of 0.0), which the calibrated model turns into 56% kept through the tender deadline. Ranked by ZiPS and Steamer instead, which credit his longer track record, he is 4th (0.5 WAR, bar 0.0), worth 56% kept on the same model.

By recent record: returning RPProj. WAR
1. Andres Muñoz2.1
2. Matt Brash1.3
3. Gabe Speier1.3
4. Jose A. Ferrer1.1
5. Cooper Criswell0.6
6. Seranthony Dominguez0.3
7. Michael Rucker0.1
8. Eduard Bazardo0.0
9. Robinson Ortizlast job0.0
10. Cole Wilcox-0.1
11. Troy Taylor-0.3
12. Nick Davila-0.4
By ZiPS / Steamer: returning RPProj. WAR
1. Andres Muñoz0.8
2. Matt Brash0.7
3. Jose A. Ferrer0.7
4. Cooper Criswell0.5
5. Gabe Speier0.5
6. Seranthony Dominguez0.5
7. Eduard Bazardo0.4
8. Cole Wilcox0.2
9. Nick Davilalast job0.0
10. Michael Rucker0.0
11. Robinson Ortiz-0.1
12. Carlos M. Vargas-0.1

Departing free agents are excluded; players on club, mutual or player options are counted as returning. The kept probability is calibrated on every September since 2012 using the recent-record projection; the ZiPS/Steamer reading uses the same model with a different ranking, so treat it as a second opinion rather than a calibrated number. Salary enters once arbitration projections publish in October.

October: Post-season eligible

On the 40-man before noon ET Sep 1. He stays eligible as long as he remains on the 40-man or 60-day IL through the post-season; an outright after the cutoff would end automatic eligibility.

The post-season eligibility list is fixed at noon ET on September 1: everyone on the 40-man, the 60-day IL or the military list at that moment, who then stays there without interruption. Attachment 25 (Major League Rule 40)

What happens if the club…

option him to the minorsBLOCKED
Out of options: the only route to the minors is outright waivers, where any club can claim him for $50,000.
Out of options
designate him for assignment (or put him on outright waivers)
The club has 7 days to trade him, pass him through outright waivers, or release him; he is paid at the major-league rate and keeps accruing service in the meantime. On outright waivers any club can claim him for $50,000, worst record first, and the claiming club takes his contract (1 yr, $800k (2026)). He was outrighted before (1x) give him the Article XX-D choice: elect free agency immediately (giving up the rest of his salary) or accept the assignment, keep getting paid, and elect free agency after the season unless he is added back to a 40-man first. Post-season: an outright after the September 1 cutoff ends his automatic eligibility. He could only return as an approved injury replacement, and only if he accepts the outright and stays on a minor-league reserve list in the organization without interruption; a release makes him ineligible for anyone this October.
Designated for assignment: 7 days · Outright waivers · Article XX-D: the right to walk
release him
Release waivers cost a claiming club $1 but the claimant assumes the whole contract, so expensive players clear. The club owes the full unpaid balance of this season's salary, offset by whatever another club pays him this year. A released player is not post-season eligible for any club this year.
Release waivers and termination pay · Which rate a split contract pays at release
trade himBLOCKED
Not now: players on major-league contracts cannot be traded after the Aug 3 deadline until the day after the World Series.
Trade deadline · 10-and-5 rights · June 15 no-trade for free-agent signees
non-tender him
At the tender deadline (Nov 20) the club can decline to offer a contract: no waivers, no termination pay, and he can be re-signed the same night. Tendering means arbitration, where he cannot be cut more than 20% from this year's salary.
Tender deadline · Arbitration: 3 to 6 years · Maximum salary cut

What the rules say about him

Option years, season by season

SeasonDays on optionOption year usedStints
2025162yesApr 7, 2025 to Apr 26, 2025 (19d)Apr 27, 2025 to May 14, 2025 (17d)May 16, 2025 to May 24, 2025 (8d)May 25, 2025 to Jun 3, 2025 (9d)Jun 7, 2025 to Jul 2, 2025 (25d)Jul 3, 2025 to Jul 29, 2025 (26d)Aug 2, 2025 to Sep 29, 2025 (58d)
202456yesMar 22, 2024 to Apr 13, 2024 (22d)Jun 18, 2024 to Jul 12, 2024 (24d)Sep 21, 2024 to Oct 1, 2024 (10d)
2023150yesApr 22, 2023 to May 21, 2023 (29d)May 27, 2023 to Jun 3, 2023 (7d)Jun 4, 2023 to Jun 6, 2023 (2d)Jun 8, 2023 to Jul 15, 2023 (37d)Jul 16, 2023 to Aug 10, 2023 (25d)Aug 12, 2023 to Aug 19, 2023 (7d)Aug 20, 2023 to Sep 30, 2023 (41d)Oct 1, 2023 to Nov 14, 2023 (2d)
20223no (under 20)Jul 16, 2022 to Jul 19, 2022 (3d)
202135yesAug 28, 2021 to Sep 18, 2021 (21d)Sep 20, 2021 to Oct 5, 2021 (14d)

Transaction log

Aug 31, 2026Status changeSeattle Mariners activated RHP Cooper Criswell from the 60-day injured list.
Jul 3, 2026Status changeSeattle Mariners transferred RHP Cooper Criswell from the 15-day injured list to the 60-day injured list. Right shoulder strain.
Jun 9, 2026Status changeSeattle Mariners placed RHP Cooper Criswell on the 15-day injured list. Right shoulder strain.
Jan 23, 2026TradedNew York Mets traded RHP Cooper Criswell to Seattle Mariners for cash.
Jan 21, 2026Designated for assignmentNew York Mets designated RHP Cooper Criswell for assignment.
Dec 5, 2025Claimed off waiversNew York Mets claimed RHP Cooper Criswell off waivers from Boston Red Sox.
Dec 4, 2025Designated for assignmentBoston Red Sox designated RHP Cooper Criswell for assignment.
Oct 3, 2025Status changeBoston Red Sox activated RHP Cooper Criswell.
Sep 29, 2025RecalledBoston Red Sox recalled RHP Cooper Criswell from Worcester Red Sox.
Aug 2, 2025OptionedBoston Red Sox optioned RHP Cooper Criswell to Worcester Red Sox.
Jul 29, 2025RecalledBoston Red Sox recalled RHP Cooper Criswell from Worcester Red Sox.
Jul 3, 2025OptionedBoston Red Sox optioned RHP Cooper Criswell to Worcester Red Sox.
Jul 2, 2025RecalledBoston Red Sox recalled RHP Cooper Criswell from Worcester Red Sox.
Jun 7, 2025OptionedBoston Red Sox optioned RHP Cooper Criswell to Worcester Red Sox.
Jun 3, 2025RecalledBoston Red Sox recalled RHP Cooper Criswell from Worcester Red Sox.
May 25, 2025OptionedBoston Red Sox optioned RHP Cooper Criswell to Worcester Red Sox.
May 24, 2025RecalledBoston Red Sox recalled RHP Cooper Criswell from Worcester Red Sox.
May 15, 2025OptionedBoston Red Sox optioned RHP Cooper Criswell to Worcester Red Sox.
May 14, 2025RecalledBoston Red Sox recalled RHP Cooper Criswell from Worcester Red Sox.
Apr 27, 2025OptionedBoston Red Sox optioned RHP Cooper Criswell to Worcester Red Sox.
Apr 26, 2025RecalledBoston Red Sox recalled RHP Cooper Criswell from Worcester Red Sox.
Apr 7, 2025OptionedBoston Red Sox optioned RHP Cooper Criswell to Worcester Red Sox.
Oct 1, 2024RecalledBoston Red Sox recalled RHP Cooper Criswell from Worcester Red Sox.
Sep 21, 2024OptionedBoston Red Sox optioned RHP Cooper Criswell to Worcester Red Sox.
Aug 16, 2024Status changeBoston Red Sox activated RHP Cooper Criswell from the 10-day injured list.
Aug 9, 2024Status changeBoston Red Sox placed RHP Cooper Criswell on the 10-day injured list retroactive to August 8, 2024.
Jul 12, 2024RecalledBoston Red Sox recalled RHP Cooper Criswell from Worcester Red Sox.
Jun 18, 2024OptionedBoston Red Sox optioned RHP Cooper Criswell to Worcester Red Sox.
Apr 13, 2024RecalledBoston Red Sox recalled RHP Cooper Criswell from Worcester Red Sox.
Mar 22, 2024OptionedBoston Red Sox optioned RHP Cooper Criswell to Worcester Red Sox.
Dec 13, 2023Signed as free agentBoston Red Sox signed free agent RHP Cooper Criswell.
Nov 14, 2023Designated for assignmentTampa Bay Rays designated RHP Cooper Criswell for assignment.
Oct 5, 2023Status changeTampa Bay Rays activated RHP Cooper Criswell.
Oct 1, 2023OptionedTampa Bay Rays optioned RHP Cooper Criswell to Durham Bulls.
Sep 30, 2023RecalledTampa Bay Rays recalled RHP Cooper Criswell from Durham Bulls.
Aug 20, 2023OptionedTampa Bay Rays optioned RHP Cooper Criswell to Durham Bulls.
Aug 19, 2023RecalledTampa Bay Rays recalled RHP Cooper Criswell from Durham Bulls.
Aug 12, 2023OptionedTampa Bay Rays optioned RHP Cooper Criswell to Durham Bulls.
Aug 10, 2023RecalledTampa Bay Rays recalled RHP Cooper Criswell from Durham Bulls.
Jul 16, 2023OptionedTampa Bay Rays optioned RHP Cooper Criswell to Durham Bulls.

Service through 2025 per FanGraphs RosterResource; options and this-season service reconstructed from the MLB transaction log (reconstruction; FanGraphs shows 0). Rule 5 exposure deadline Nov 17, 2026.