Joe Rock
RP · L/L · age 26.1 · ATHOCTOBER OK
OPTIONED
0+033
0+075 / 0+075
2 (using one in 2026)
2 of 5
PRE-ARBITRATION / AUTO-RENEWAL
Waivers (CHW) Aug'26
0 / 1
none listed
Next 90 days, by the model
41%
44%
12%
1%
3%
Pushing the cut risk up: this season's WAR (-0.03) raises it, roster status (3) raises it, last season's WAR (0.03) raises it.
Context the model does not weigh: ZiPS projects 1.1 WAR, -0.0 WAR this season; 16 RP on the 40-man, of whom Mark Leiter Jr. 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?
ATH returns 15 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 11th among the returners (-0.0 WAR against a bar of 0.1), which the calibrated model turns into 54% kept through the tender deadline. Ranked by ZiPS and Steamer instead, which credit his longer track record, he is 1st (0.6 WAR, bar 0.1), worth 74% kept on the same model.
| By recent record: returning RP | Proj. WAR |
|---|---|
| 1. Brady Basso | 1.3 |
| 2. Luis Medina | 1.1 |
| 3. Hogan Harris | 0.8 |
| 4. Drew Rom | 0.4 |
| 5. Hayden Juenger | 0.4 |
| 6. Scott Blewett | 0.3 |
| 7. Elvis Alvarado | 0.2 |
| 8. Brooks Kriske | 0.2 |
| 9. Geoff Hartlieblast job | 0.1 |
| 10. Seth Johnson | 0.1 |
| 11. Joe Rock | -0.0 |
| 12. Hunter Bigge | -0.0 |
| By ZiPS / Steamer: returning RP | Proj. WAR |
|---|---|
| 1. Joe Rock | 0.6 |
| 2. Luis Medina | 0.5 |
| 3. Brady Basso | 0.5 |
| 4. Drew Rom | 0.5 |
| 5. Hogan Harris | 0.3 |
| 6. Justin Sterner | 0.3 |
| 7. Elvis Alvarado | 0.1 |
| 8. Yunior Tur | 0.1 |
| 9. Hayden Juengerlast job | 0.1 |
| 10. Scott Blewett | 0.1 |
| 11. Geoff Hartlieb | 0.1 |
| 12. Hunter Bigge | 0.0 |
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 minors
- Yes, 2 option years left. 2 of the five optional assignments for 2026 remain. A 2026 option year is already used (132 days), so further trips this season cost nothing extra. 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 and the 20-day rule2 option years left entering 2026; 132 option days this season uses one (1 after 2026).A season with fewer than 20 days on optional assignment does not count as an option year, and those days count as Major League service. 2022-2026 Basic Agreement, Article XIX(E) and XXI(B), p. 98 (the number itself is in Major League Rule 7(c))
- Five optional assignments per seasonOptioned 3 times this season that count toward the cap of 5: 2 left.A player can be optioned at most five times in a season; a sixth trip requires outright waivers. 2022-2026 Basic Agreement, Article XIX(E), p. 98 (the number itself is in Major League Rule 7(c))
- 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 2024 otherwise).
Option years, season by season
| Season | Days on option | Option year used | Stints |
|---|---|---|---|
| 2026 | 132 | yes | Mar 11, 2026 to Apr 10, 2026 (16d, spring training)Apr 12, 2026 to May 19, 2026 (37d)Jun 25, 2026 to Aug 14, 2026 (50d)Aug 17, 2026 to now (29d) |
| 2025 | 181 | yes | Mar 7, 2025 to Jun 28, 2025 (102d, spring training)Jul 6, 2025 to Jul 31, 2025 (25d)Aug 1, 2025 to Sep 6, 2025 (36d)Sep 11, 2025 to Sep 29, 2025 (18d) |
Transaction log
| Aug 17, 2026 | Optioned | Athletics optioned LHP Joe Rock to Las Vegas Aviators. |
| Aug 16, 2026 | Claimed off waivers | Athletics claimed LHP Joe Rock off waivers from Chicago White Sox. |
| Aug 14, 2026 | Designated for assignment | Chicago White Sox designated LHP Joe Rock for assignment. |
| Jun 25, 2026 | Optioned | Chicago White Sox optioned LHP Joe Rock to Charlotte Knights. |
| Jun 9, 2026 | Recalled | Chicago White Sox recalled LHP Joe Rock from Charlotte Knights. |
| May 19, 2026 | Traded | Tampa Bay Rays traded LHP Joe Rock to Chicago White Sox for 3B Oliver Dunn. |
| Apr 12, 2026 | Optioned | Tampa Bay Rays optioned LHP Joe Rock to Durham Bulls. |
| Apr 10, 2026 | Recalled | Tampa Bay Rays recalled LHP Joe Rock from Durham Bulls. |
| Mar 11, 2026 | Optioned | Tampa Bay Rays optioned LHP Joe Rock to Durham Bulls. |
| Sep 29, 2025 | Recalled | Tampa Bay Rays recalled LHP Joe Rock from Durham Bulls. |
| Sep 11, 2025 | Optioned | Tampa Bay Rays optioned LHP Joe Rock to Durham Bulls. |
| Sep 6, 2025 | Recalled | Tampa Bay Rays recalled LHP Joe Rock from Durham Bulls. |
| Aug 1, 2025 | Optioned | Tampa Bay Rays optioned LHP Joe Rock to Durham Bulls. |
| Jul 31, 2025 | Recalled | Tampa Bay Rays recalled LHP Joe Rock from Durham Bulls. |
| Jul 6, 2025 | Optioned | Tampa Bay Rays optioned LHP Joe Rock to Durham Bulls. |
| Jun 28, 2025 | Recalled | Tampa Bay Rays recalled LHP Joe Rock from Durham Bulls. |
| Mar 7, 2025 | Optioned | Tampa Bay Rays optioned LHP Joe Rock to Durham Bulls. |
| Nov 18, 2024 | Contract selected | Tampa Bay Rays selected the contract of LHP Joe Rock from Durham Bulls. |
| Mar 21, 2024 | Traded | Tampa Bay Rays traded SS Greg Jones to Colorado Rockies for LHP Joe Rock. |
| Jul 21, 2021 | Signed | Colorado Rockies signed LHP Joe Rock. |
Service through 2025 per FanGraphs RosterResource; options and this-season service reconstructed from the MLB transaction log (reconstruction; FanGraphs shows 2). Rule 5 exposure deadline Nov 17, 2026.