Casey Mize
SP · R/R · age 29.4 · SDXIX-AXX-B FAOCTOBER OK
ACTIVE
5+111
6+111 / 6+111
3
5 of 5
FREE AGENT
Trade (DET) Aug'26
0 / 0
1 yr, $6.15M (2026)
Next 90 days, by the model
99%
<1%
<1%
1%
<1%
Pushing the cut risk around: this season's WAR (2.76) lowers it, age (29.37) raises it, last season's WAR (2.44) lowers it.
Context the model does not weigh: ZiPS projects 1.7 WAR, 2.8 WAR this season; 9 SP on the 40-man, of whom Casey Mize, Walker Buehler, Robbie Ray 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?
SD returns 6 SP on the 40-man once 3 free agents leave; about 8 SP jobs survive a normal winter. By his own recent record he ranks 7th among the returners (2.3 WAR against a bar of 0.1), which the calibrated model turns into 100% kept through the tender deadline. Ranked by ZiPS and Steamer instead, which credit his longer track record, he is 7th (1.9 WAR, bar 0.3), worth 100% kept on the same model.
| By recent record: returning SP | Proj. WAR |
|---|---|
| 1. Nick Pivetta | 2.5 |
| 2. Michael King | 1.8 |
| 3. Lucas Giolito | 0.9 |
| 4. Joe Musgrove | 0.9 |
| 5. JP Sears | 0.6 |
| 6. Jhony Brito | 0.1 |
| By ZiPS / Steamer: returning SP | Proj. WAR |
|---|---|
| 1. Michael King | 2.4 |
| 2. Nick Pivetta | 2.4 |
| 3. Joe Musgrove | 1.7 |
| 4. Lucas Giolito | 1.1 |
| 5. JP Sears | 0.4 |
| 6. Jhony Brito | 0.3 |
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 (1 yr, $6.15M (2026)). 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. With real money left on the contract a claim is unlikely; the usual outcome is clearing waivers, then release, with the club paying the balance less what a new club pays him.
- 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
- Article XIX-A: five years, no forced assignment5+111 of MLB service through 2025: can refuse an optional assignment and cannot be outrighted without consent.A player with five or more years of Major League service cannot be assigned anywhere but another Major League club without his written consent. 2022-2026 Basic Agreement, Article XIX(A)(2), p. 94
- Article XIX-A: five years, no forced outright5+ years of service: an outright assignment requires his consent; otherwise the club must keep, trade or release him.A player with five or more years of service can refuse an outright assignment altogether; the club must then keep him, trade him, or release him. 2022-2026 Basic Agreement, Article XIX(A)(2), p. 94
- Article XX-B free agency6+111 of service with no contract for 2027: Article XX-B free agent the day after the World Series.Six or more years of service with an expiring contract: free agent at 9 AM ET the day after the last World Series game. 2022-2026 Basic Agreement, Article XX(B)(1)-(2), p. 102
- Post-season roster eligibilityOn 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. 2022-2026 Basic Agreement, Attachment 25, p. 253 (the number itself is in Major League Rule 40)
- Rule 5 clockOn a 40-man roster (would first be exposed after 2021 otherwise).
Transaction log
| Aug 4, 2026 | Status change | San Diego Padres activated RHP Casey Mize. |
| Aug 3, 2026 | Traded | Detroit Tigers traded RHP Casey Mize and 3B Gage Workman to San Diego Padres for LHP Kash Mayfield and LHP Jackson Wolf. |
| Jun 17, 2026 | Status change | Detroit Tigers activated RHP Casey Mize from the 15-day injured list. |
| May 29, 2026 | Status change | Detroit Tigers placed RHP Casey Mize on the 15-day injured list retroactive to May 28, 2026. Right adductor inflammation. |
| May 16, 2026 | Status change | Detroit Tigers activated RHP Casey Mize from the 15-day injured list. |
| Apr 29, 2026 | Status change | Detroit Tigers placed RHP Casey Mize on the 15-day injured list. Right adductor strain. |
| May 24, 2025 | Status change | Detroit Tigers activated RHP Casey Mize from the 15-day injured list. |
| May 10, 2025 | Status change | Detroit Tigers placed RHP Casey Mize on the 15-day injured list retroactive to May 9, 2025. Left hamstring strain. |
| Oct 13, 2024 | Status change | Detroit Tigers activated RHP Casey Mize. |
| Aug 30, 2024 | Status change | Detroit Tigers activated RHP Casey Mize from the 60-day injured list. |
| Jul 3, 2024 | Status change | Detroit Tigers placed RHP Casey Mize on the 60-day injured list. |
| Jul 3, 2024 | Status change | Detroit Tigers placed RHP Casey Mize on the 15-day injured list. Left hamstring strain. |
| Nov 6, 2023 | Status change | Detroit Tigers activated RHP Casey Mize from the 60-day injured list. |
| Feb 17, 2023 | Status change | Detroit Tigers placed RHP Casey Mize on the 60-day injured list. Right elbow injury. |
| Nov 10, 2022 | Status change | Detroit Tigers activated RHP Casey Mize from the 60-day injured list. |
| May 31, 2022 | Status change | Detroit Tigers placed RHP Casey Mize on the 60-day injured list. Right elbow sprain. |
| Apr 15, 2022 | Status change | Detroit Tigers placed RHP Casey Mize on the 10-day injured list. Right elbow sprain. |
| Aug 19, 2020 | Contract selected | Detroit Tigers selected the contract of RHP Casey Mize and. |
| Aug 19, 2020 | Contract selected | Detroit Tigers selected the contract of P Casey Mize. |
| Aug 19, 2020 | Contract selected | Detroit Tigers selected the contract of RHP Casey Mize from Tigers Alternate Training Site. |
| Jun 25, 2018 | Signed | Detroit Tigers signed RHP Casey Mize. |
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.