Joe Rock

RP · L/L · age 26.1 · ATH

OCTOBER OK

Roster status
OPTIONED
Service thru 2025
0+033
Service now / projected
0+075 / 0+075
Option years left (2026)
2 (using one in 2026)
Assignments left this season
2 of 5
Contract (2027)
PRE-ARBITRATION / AUTO-RENEWAL
Acquired
Waivers (CHW) Aug'26
Outrighted / DFA'd before
0 / 1
Contract
none listed

Next 90 days, by the model

Stays put
41%
Designated
44%
Optioned
12%
Traded
1%
Released or non-tendered
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 RPProj. WAR
1. Brady Basso1.3
2. Luis Medina1.1
3. Hogan Harris0.8
4. Drew Rom0.4
5. Hayden Juenger0.4
6. Scott Blewett0.3
7. Elvis Alvarado0.2
8. Brooks Kriske0.2
9. Geoff Hartlieblast job0.1
10. Seth Johnson0.1
11. Joe Rock-0.0
12. Hunter Bigge-0.0
By ZiPS / Steamer: returning RPProj. WAR
1. Joe Rock0.6
2. Luis Medina0.5
3. Brady Basso0.5
4. Drew Rom0.5
5. Hogan Harris0.3
6. Justin Sterner0.3
7. Elvis Alvarado0.1
8. Yunior Tur0.1
9. Hayden Juengerlast job0.1
10. Scott Blewett0.1
11. Geoff Hartlieb0.1
12. Hunter Bigge0.0

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, season by season

SeasonDays on optionOption year usedStints
2026132yesMar 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)
2025181yesMar 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, 2026OptionedAthletics optioned LHP Joe Rock to Las Vegas Aviators.
Aug 16, 2026Claimed off waiversAthletics claimed LHP Joe Rock off waivers from Chicago White Sox.
Aug 14, 2026Designated for assignmentChicago White Sox designated LHP Joe Rock for assignment.
Jun 25, 2026OptionedChicago White Sox optioned LHP Joe Rock to Charlotte Knights.
Jun 9, 2026RecalledChicago White Sox recalled LHP Joe Rock from Charlotte Knights.
May 19, 2026TradedTampa Bay Rays traded LHP Joe Rock to Chicago White Sox for 3B Oliver Dunn.
Apr 12, 2026OptionedTampa Bay Rays optioned LHP Joe Rock to Durham Bulls.
Apr 10, 2026RecalledTampa Bay Rays recalled LHP Joe Rock from Durham Bulls.
Mar 11, 2026OptionedTampa Bay Rays optioned LHP Joe Rock to Durham Bulls.
Sep 29, 2025RecalledTampa Bay Rays recalled LHP Joe Rock from Durham Bulls.
Sep 11, 2025OptionedTampa Bay Rays optioned LHP Joe Rock to Durham Bulls.
Sep 6, 2025RecalledTampa Bay Rays recalled LHP Joe Rock from Durham Bulls.
Aug 1, 2025OptionedTampa Bay Rays optioned LHP Joe Rock to Durham Bulls.
Jul 31, 2025RecalledTampa Bay Rays recalled LHP Joe Rock from Durham Bulls.
Jul 6, 2025OptionedTampa Bay Rays optioned LHP Joe Rock to Durham Bulls.
Jun 28, 2025RecalledTampa Bay Rays recalled LHP Joe Rock from Durham Bulls.
Mar 7, 2025OptionedTampa Bay Rays optioned LHP Joe Rock to Durham Bulls.
Nov 18, 2024Contract selectedTampa Bay Rays selected the contract of LHP Joe Rock from Durham Bulls.
Mar 21, 2024TradedTampa Bay Rays traded SS Greg Jones to Colorado Rockies for LHP Joe Rock.
Jul 21, 2021SignedColorado 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.