Connor Thomas

RP · L/L · age 28.3 · KC

XX-DOCTOBER OK

Roster status
ACTIVE
Service thru 2025
1+000
Service now / projected
1+038 / 1+051
Option years left (2026)
2 (using one in 2026)
Assignments left this season
1 of 5
Contract (2027)
PRE-ARBITRATION / AUTO-RENEWAL
Acquired
Waivers (ATH) Aug'26
Outrighted / DFA'd before
2 / 2
Contract
none listed

Next 90 days, by the model

Stays put
28%
Designated
37%
Optioned
32%
Traded
1%
Released or non-tendered
3%

Pushing the cut risk up: this season's WAR (-0.11) raises it, last season's WAR (-0.24) raises it, time with the club (41) raises it.

Context the model does not weigh: ZiPS projects 0.8 WAR, -0.1 WAR this season; 18 RP on the 40-man, of whom Craig Kimbrel 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?

KC returns 17 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 17th among the returners (-0.6 WAR against a bar of 0.1), which the calibrated model turns into 37% kept through the tender deadline. Ranked by ZiPS and Steamer instead, which credit his longer track record, he is 2nd (0.4 WAR, bar 0.2), worth 55% kept on the same model.

By recent record: returning RPProj. WAR
1. Carlos Estevez1.2
2. Nick Mears0.6
3. Nate Pearson0.6
4. Lucas Erceg0.6
5. Jose Cuas0.4
6. Anthony Gose0.3
7. Nolan Hoffman0.3
8. Spencer Bivens0.2
9. James McArthurlast job0.1
10. Connor Seabold0.1
11. Steven Cruz-0.1
12. Luke Little-0.2
By ZiPS / Steamer: returning RPProj. WAR
1. Lucas Erceg0.5
2. Connor Thomas0.4
3. Easton McGee0.3
4. Nick Mears0.3
5. Luke Little0.3
6. James McArthur0.3
7. Alex Lange0.2
8. Steven Cruz0.2
9. Carlos Estevezlast job0.2
10. Connor Seabold0.1
11. Nate Pearson0.1
12. Anthony Gose-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. 1 of the five optional assignments for 2026 remain. A 2026 option year is already used (32 days), so further trips this season cost nothing extra. Once down he must stay 15 days unless he replaces an injured or traded player. An option does not trigger his Article XX-D right; only an outright would.
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. He was outrighted before (2x) give him the Article XX-D choice: elect free agency immediately (giving up the rest of his salary) or accept the assignment, keep getting paid, and elect free agency after the season unless he is added back to a 40-man first. 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
202632yesJul 8, 2026 to Jul 25, 2026 (17d)Jul 29, 2026 to Jul 30, 2026 (1d)Jul 31, 2026 to Aug 1, 2026 (1d)Aug 4, 2026 to Aug 17, 2026 (13d)
2023186yesMar 16, 2023 to Oct 2, 2023 (186d, spring training)

Transaction log

Aug 17, 2026RecalledKansas City Royals recalled LHP Connor Thomas from Omaha Storm Chasers.
Aug 4, 2026OptionedKansas City Royals optioned LHP Connor Thomas to Omaha Storm Chasers.
Aug 4, 2026Claimed off waiversKansas City Royals claimed LHP Connor Thomas off waivers from Athletics.
Aug 1, 2026Designated for assignmentAthletics designated LHP Connor Thomas for assignment.
Jul 31, 2026OptionedAthletics optioned LHP Connor Thomas to Las Vegas Aviators.
Jul 30, 2026Claimed off waiversAthletics claimed LHP Connor Thomas off waivers from Atlanta Braves.
Jul 29, 2026OptionedAtlanta Braves optioned LHP Connor Thomas to Gwinnett Stripers.
Jul 25, 2026RecalledAtlanta Braves recalled LHP Connor Thomas from Gwinnett Stripers.
Jul 8, 2026OptionedAtlanta Braves optioned LHP Connor Thomas to Gwinnett Stripers.
Jul 7, 2026Contract selectedAtlanta Braves selected the contract of LHP Connor Thomas from Gwinnett Stripers.
Nov 6, 2025Signed as free agentAtlanta Braves signed free agent LHP Connor Thomas to a minor league contract.
Oct 23, 2025Status changeMilwaukee Brewers activated LHP Connor Thomas from the 60-day injured list.
Oct 23, 2025OutrightedMilwaukee Brewers sent LHP Connor Thomas outright to Nashville Sounds.
May 18, 2025Status changeMilwaukee Brewers transferred LHP Connor Thomas from the 15-day injured list to the 60-day injured list. Left elbow arthritis.
Apr 8, 2025Status changeMilwaukee Brewers placed LHP Connor Thomas on the 15-day injured list retroactive to April 6, 2025. Left elbow arthritis.
Mar 27, 2025Status changeMilwaukee Brewers activated LHP Connor Thomas.
Dec 11, 2024Rule 5 pickMilwaukee Brewers purchased contract of LHP Connor Thomas from St. Louis Cardinals in the Rule 5 Draft.
Nov 16, 2023OutrightedSt. Louis Cardinals sent LHP Connor Thomas outright to Memphis Redbirds.
Nov 14, 2023Designated for assignmentSt. Louis Cardinals designated LHP Connor Thomas for assignment.
Oct 2, 2023RecalledSt. Louis Cardinals recalled LHP Connor Thomas from Memphis Redbirds.
Mar 16, 2023OptionedSt. Louis Cardinals optioned LHP Connor Thomas to Memphis Redbirds.
Nov 15, 2022Contract selectedSt. Louis Cardinals selected the contract of LHP Connor Thomas from Memphis Redbirds.
Jun 21, 2019SignedSt. Louis Cardinals signed LHP Connor Thomas.

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.