Trent Thornton

RP · R/R · age 33 · CHC

XIX-AXX-B FAOCTOBER OK

Roster status
15-DAY IL (Sprained ankle)
Service thru 2025
5+148
Service now / projected
6+108 / 6+121
Option years left (2026)
0
Assignments left this season
n/a of 5
Contract (2027)
FREE AGENT (XX-B) UNLESS SIGNED
Acquired
Free Agent (SEA) Jan'26
Outrighted / DFA'd before
0 / 1
Contract
none listed

Next 90 days, by the model

Stays put
86%
Designated
9%
Optioned
<1%
Traded
2%
Released or non-tendered
3%

Pushing the cut risk around: this season's WAR (-0.48) raises it, age (32.96) raises it, this season's innings (48.10) lowers it.

Context the model does not weigh: ZiPS projects 0.0 WAR, -0.5 WAR this season; 20 RP on the 40-man, of whom Aaron Civale, Trent Thornton are 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?

CHC returns 18 RP on the 40-man once 2 free agents leave; about 9 RP jobs survive a normal winter. By his own recent record he ranks 19th among the returners (-0.5 WAR against a bar of 0.5), which the calibrated model turns into 89% kept through the tender deadline. Ranked by ZiPS and Steamer instead, which credit his longer track record, he is 19th (0.0 WAR, bar 0.2), worth 97% kept on the same model.

By recent record: returning RPProj. WAR
1. Edward Cabrera0.9
2. Daniel Palencia0.9
3. Hunter Harvey0.8
4. Colin Rea0.8
5. Phil Maton0.7
6. Shelby Miller0.6
7. Jacob Webb0.6
8. Riley Martin0.5
9. Caleb Thielbarlast job0.5
10. Tyler Ferguson0.3
11. Javier Assad0.3
12. Jayden Murray0.1
By ZiPS / Steamer: returning RPProj. WAR
1. Edward Cabrera1.7
2. Hunter Harvey0.8
3. Colin Rea0.8
4. Daniel Palencia0.5
5. Caleb Thielbar0.5
6. Javier Assad0.5
7. Phil Maton0.2
8. Porter Hodge0.2
9. Shelby Millerlast job0.2
10. Tyler Ferguson0.1
11. Ethan Roberts0.1
12. Jacob Webb0.0

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
Not without his consent: with five years of service he can refuse the assignment or elect free agency instead. The club's only unilateral moves are to keep him, trade him, or release him.
Article XIX-A: five years, no forced assignment
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. If he clears, he cannot be outrighted without his consent: he can refuse and force a release with his contract intact, or elect free agency (forfeiting termination pay). 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. Because he is on the injured list he cannot be outrighted until he is healthy and reinstated, so a DFA now would have to end in a trade or a release.
Designated for assignment: 7 days · Outright waivers · Article XIX-A: five years, no forced outright
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
Let the season end
He becomes an Article XX-B free agent at 9 AM ET the day after the World Series; only the club can talk to him for five days after that. A qualifying offer is possible only if he has been with the club since Opening Day and never received one before.
Article XX-B free agency · Qualifying offer

What the rules say about him

Option years, season by season

SeasonDays on optionOption year usedStints
2023107yesMar 25, 2023 to Jun 19, 2023 (81d, spring training)Jul 1, 2023 to Jul 21, 2023 (20d)Jul 26, 2023 to Aug 1, 2023 (6d, within 24h of trade)
202291yesMay 14, 2022 to May 31, 2022 (17d)Jul 6, 2022 to Jul 30, 2022 (24d)Aug 6, 2022 to Aug 7, 2022 (1d)Aug 17, 2022 to Oct 5, 2022 (49d)
202160yesJul 7, 2021 to Jul 25, 2021 (18d)Jul 31, 2021 to Aug 7, 2021 (7d)Aug 8, 2021 to Aug 10, 2021 (2d)Aug 11, 2021 to Aug 11, 2021 (0d)Aug 31, 2021 to Sep 12, 2021 (12d)Sep 13, 2021 to Oct 5, 2021 (21d)

Transaction log

Sep 12, 2026Status changeChicago Cubs placed RHP Trent Thornton on the 15-day injured list. Left ankle sprain.
Jun 12, 2026Status changeChicago Cubs activated RHP Trent Thornton from the paternity list.
Jun 9, 2026Status changeChicago Cubs placed RHP Trent Thornton on the paternity list.
May 6, 2026Contract selectedChicago Cubs selected the contract of RHP Trent Thornton from Iowa Cubs.
Jan 23, 2026Signed as free agentChicago Cubs signed free agent RHP Trent Thornton to a minor league contract.
Nov 21, 2025Declared free agentRHP Trent Thornton elected free agency.
Nov 5, 2025Status changeSeattle Mariners activated RHP Trent Thornton from the 60-day injured list.
Aug 19, 2025Status changeSeattle Mariners transferred RHP Trent Thornton from the 15-day injured list to the 60-day injured list. Left achilles tear.
Aug 1, 2025Status changeSeattle Mariners placed RHP Trent Thornton on the 15-day injured list. Left achilles tear.
Jun 7, 2025Status changeSeattle Mariners activated RHP Trent Thornton from the 15-day injured list.
May 9, 2025Status changeSeattle Mariners placed RHP Trent Thornton on the 15-day injured list retroactive to May 6, 2025. Appendicitis.
Aug 1, 2023RecalledSeattle Mariners recalled RHP Trent Thornton from Tacoma Rainiers.
Jul 26, 2023OptionedSeattle Mariners optioned RHP Trent Thornton to Tacoma Rainiers.
Jul 26, 2023TradedToronto Blue Jays traded RHP Trent Thornton to Seattle Mariners for SS Mason McCoy.
Jul 21, 2023Designated for assignmentToronto Blue Jays designated RHP Trent Thornton for assignment.
Jul 1, 2023OptionedToronto Blue Jays optioned RHP Trent Thornton to Buffalo Bisons.
Jun 19, 2023RecalledToronto Blue Jays recalled RHP Trent Thornton from Buffalo Bisons.
Mar 25, 2023OptionedToronto Blue Jays optioned RHP Trent Thornton to Buffalo Bisons.
Oct 9, 2022Status changeToronto Blue Jays activated RHP Trent Thornton.
Oct 5, 2022RecalledToronto Blue Jays recalled RHP Trent Thornton from Buffalo Bisons.
Aug 17, 2022OptionedToronto Blue Jays optioned RHP Trent Thornton to Buffalo Bisons.
Aug 7, 2022RecalledToronto Blue Jays recalled RHP Trent Thornton from Buffalo Bisons.
Aug 6, 2022OptionedToronto Blue Jays optioned RHP Trent Thornton to Buffalo Bisons.
Jul 30, 2022RecalledToronto Blue Jays recalled RHP Trent Thornton from Buffalo Bisons.
Jul 6, 2022OptionedToronto Blue Jays optioned RHP Trent Thornton to Buffalo Bisons.
May 31, 2022RecalledToronto Blue Jays recalled RHP Trent Thornton from Buffalo Bisons.
May 14, 2022OptionedToronto Blue Jays optioned RHP Trent Thornton to Buffalo Bisons.
Oct 5, 2021RecalledToronto Blue Jays recalled RHP Trent Thornton, and from Buffalo Bisons.
Sep 13, 2021OptionedToronto Blue Jays optioned RHP Trent Thornton to Buffalo Bisons.
Sep 12, 2021RecalledToronto Blue Jays recalled RHP Trent Thornton from Buffalo Bisons.
Aug 31, 2021OptionedToronto Blue Jays optioned RHP Trent Thornton to Buffalo Bisons.
Aug 11, 2021RecalledToronto Blue Jays recalled RHP Trent Thornton from Buffalo Bisons.
Aug 11, 2021OptionedToronto Blue Jays optioned RHP Trent Thornton to Buffalo Bisons.
Aug 10, 2021RecalledToronto Blue Jays recalled RHP Trent Thornton from Buffalo Bisons.
Aug 8, 2021OptionedToronto Blue Jays optioned RHP Trent Thornton to Buffalo Bisons.
Aug 7, 2021RecalledToronto Blue Jays recalled RHP Trent Thornton from Buffalo Bisons.
Jul 31, 2021OptionedToronto Blue Jays optioned RHP Trent Thornton to Buffalo Bisons.
Jul 25, 2021RecalledToronto Blue Jays recalled RHP Trent Thornton from Buffalo Bisons.
Jul 7, 2021OptionedToronto Blue Jays optioned RHP Trent Thornton to Buffalo Bisons.
Oct 30, 2020Status changeToronto Blue Jays activated P Trent Thornton from the 60 day injured list.

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