Quinn Mathews

SP · L/L · age 25.9 · STL

OCTOBER OK

Roster status
ACTIVE
Service thru 2025
0+000
Service now / projected
0+045 / 0+058
Option years left (2026)
3
Assignments left this season
3 of 5
Contract (2027)
PRE-ARBITRATION / AUTO-RENEWAL
Acquired
Drafted 4th Rd '23
Outrighted / DFA'd before
0 / 0
Contract
none listed

Next 90 days, by the model

Stays put
88%
Designated
1%
Optioned
10%
Traded
1%
Released or non-tendered
<1%

Pushing the cut risk around: last season's WAR raises it, age (25.94) lowers it, roster status (0) lowers it.

Context the model does not weigh: ZiPS projects 0.8 WAR, 0.5 WAR this season; 8 SP on the 40-man.

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?

STL returns 8 SP on the 40-man once nobody leaves; about 8 SP jobs survive a normal winter. By his own recent record he ranks 6th among the returners (0.9 WAR against a bar of -0.1), which the calibrated model turns into 98% kept through the tender deadline. Ranked by ZiPS and Steamer instead, which credit his longer track record, he is 7th (0.6 WAR, bar 0.5), worth 97% kept on the same model.

By recent record: returning SPProj. WAR
1. Kyle Leahy2.0
2. Andre Pallante1.6
3. Michael McGreevy1.4
4. Hunter Dobbins1.1
5. Matthew Liberatore1.0
6. Quinn Mathews0.9
7. Tekoah Roby0.0
8. Richard Fittslast job-0.1
By ZiPS / Steamer: returning SPProj. WAR
1. Michael McGreevy1.6
2. Matthew Liberatore1.5
3. Andre Pallante1.4
4. Richard Fitts0.7
5. Kyle Leahy0.7
6. Hunter Dobbins0.6
7. Quinn Mathews0.6
8. Tekoah Robylast job0.5

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 minors
Yes, 3 option years left. 3 of the five optional assignments for 2026 remain. He has 17 option days this season; at 20 a 2026 option year is used and those days stop counting as service. Once down he must stay 15 days unless he replaces an injured or traded player.
Option years and the 20-day rule · Five optional assignments per season · Minimum stay on option
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, the club can outright him to the minors and he has no say; he stays under club control on a minor-league deal. He would then be Rule 5-eligible and would hold XX-D rights against any future outright. 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
renew him for next year
Pre-arbitration: the club sets his 2027 salary near the minimum ($780,000 floor) and he has no leverage beyond a non-tender.
Minimum salaries · Tender deadline

What the rules say about him

Option years, season by season

SeasonDays on optionOption year usedStints
202617no (under 20)Aug 4, 2026 to Aug 17, 2026 (13d)Aug 18, 2026 to Aug 22, 2026 (4d)

Transaction log

Aug 22, 2026RecalledSt. Louis Cardinals recalled LHP Quinn Mathews from Memphis Redbirds.
Aug 18, 2026OptionedSt. Louis Cardinals optioned LHP Quinn Mathews to Memphis Redbirds.
Aug 17, 2026RecalledSt. Louis Cardinals recalled LHP Quinn Mathews from Memphis Redbirds.
Aug 4, 2026OptionedSt. Louis Cardinals optioned LHP Quinn Mathews to Memphis Redbirds.
Aug 1, 2026Contract selectedSt. Louis Cardinals selected the contract of LHP Quinn Mathews from Memphis Redbirds.
Jul 16, 2023SignedSt. Louis Cardinals signed LHP Quinn Mathews.

Service through 2025 per FanGraphs RosterResource; options and this-season service reconstructed from the MLB transaction log (reconstruction; FanGraphs shows 3). Rule 5 exposure deadline Nov 17, 2026.