Sebastian Rivero

C · R/R · age 27.8 · LAA

OCTOBER OK

Roster status
OPTIONED
Service thru 2025
0+162
Service now / projected
1+132 / 1+145
Option years left (2026)
1
Assignments left this season
5 of 5
Contract (2027)
PRE-ARBITRATION / AUTO-RENEWAL
Acquired
Free Agent (ATL) Dec'24
Outrighted / DFA'd before
0 / 1
Contract
none listed

Next 90 days, by the model

Stays put
56%
Designated
27%
Optioned
13%
Traded
3%
Released or non-tendered
1%

Pushing the cut risk up: this season's WAR (0.11) raises it, age (27.83) raises it, last season's WAR (-0.20) raises it.

Context the model does not weigh: ZiPS projects -0.6 WAR, 0.1 WAR this season; 5 C on the 40-man, of whom Travis d'Arnaud 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?

LAA returns 4 C on the 40-man once 1 free agent leaves; about 3 C jobs survive a normal winter. By his own recent record he ranks 3rd among the returners (-0.1 WAR against a bar of -0.1), which the calibrated model turns into 52% kept through the tender deadline. Ranked by ZiPS and Steamer instead, which credit his longer track record, he is 4th (-0.3 WAR, bar 0.4), worth 55% kept on the same model.

By recent record: returning CProj. WAR
1. Tyler Heineman1.6
2. Logan Porter0.2
3. Sebastian Riverolast job-0.1
4. Moises Ballesteros-0.5
By ZiPS / Steamer: returning CProj. WAR
1. Tyler Heineman0.8
2. Moises Ballesteros0.5
3. Logan Porterlast job0.4
4. Sebastian Rivero-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 minors
Yes, 1 option year left. 5 of the five optional assignments for 2026 remain. He has 0 option days this season; at 20 a 2026 option year is used and those days stop counting as service. Once down he must stay 10 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
2022111yesMar 31, 2022 to May 8, 2022 (31d, spring training)May 9, 2022 to May 9, 2022 (0d)May 13, 2022 to May 17, 2022 (4d)May 28, 2022 to Jul 14, 2022 (47d)Jul 18, 2022 to Aug 3, 2022 (16d)Aug 10, 2022 to Aug 23, 2022 (13d)
2021129yesMar 16, 2021 to May 3, 2021 (32d, spring training)May 14, 2021 to Jun 20, 2021 (37d)Jul 16, 2021 to Sep 4, 2021 (50d)Sep 21, 2021 to Oct 1, 2021 (10d)

Transaction log

Aug 15, 2026Status changeLos Angeles Angels placed C Sebastián Rivero on the 60-day injured list. Left hamate fracture.
Jun 10, 2026Status changeLos Angeles Angels placed C Sebastián Rivero on the 10-day injured list. Left hamate fracture.
Apr 26, 2026Contract selectedLos Angeles Angels selected the contract of C Sebastián Rivero from Salt Lake Bees.
Dec 3, 2025Signed as free agentLos Angeles Angels signed free agent C Sebastián Rivero to a minor league contract.
Nov 21, 2025Declared free agentC Sebastián Rivero elected free agency.
Sep 8, 2025Contract selectedLos Angeles Angels selected the contract of C Sebastián Rivero from Salt Lake Bees.
Dec 12, 2024Signed as free agentLos Angeles Angels signed free agent C Sebastián Rivero to a minor league contract.
Nov 13, 2023Signed as free agentAtlanta Braves signed free agent C Sebastián Rivero to a minor league contract.
Dec 13, 2022Signed as free agentChicago White Sox signed free agent C Sebastian Rivero to a minor league contract.
Nov 16, 2022ReleasedKansas City Royals released C Sebastian Rivero.
Nov 10, 2022Designated for assignmentKansas City Royals designated C Sebastian Rivero for assignment.
Aug 23, 2022RecalledKansas City Royals recalled C Sebastian Rivero from Northwest Arkansas Naturals.
Aug 10, 2022OptionedKansas City Royals optioned C Sebastian Rivero to Northwest Arkansas Naturals.
Aug 3, 2022RecalledKansas City Royals recalled C Sebastian Rivero from Northwest Arkansas Naturals.
Jul 18, 2022OptionedKansas City Royals optioned C Sebastian Rivero to Northwest Arkansas Naturals.
Jul 14, 2022RecalledKansas City Royals recalled C Sebastian Rivero from Northwest Arkansas Naturals.
May 28, 2022OptionedKansas City Royals optioned C Sebastian Rivero to Northwest Arkansas Naturals.
May 17, 2022RecalledKansas City Royals recalled C Sebastian Rivero from Northwest Arkansas Naturals.
May 13, 2022OptionedKansas City Royals optioned C Sebastian Rivero to Northwest Arkansas Naturals.
May 9, 2022RecalledKansas City Royals recalled C Sebastian Rivero from Northwest Arkansas Naturals.
May 9, 2022OptionedKansas City Royals optioned C Sebastian Rivero to Northwest Arkansas Naturals.
May 8, 2022RecalledKansas City Royals recalled C Sebastian Rivero from Northwest Arkansas Naturals.
Mar 31, 2022OptionedKansas City Royals optioned C Sebastian Rivero to Omaha Storm Chasers.
Oct 1, 2021RecalledKansas City Royals recalled C Sebastian Rivero from Omaha Storm Chasers.
Sep 21, 2021OptionedKansas City Royals optioned C Sebastian Rivero to Omaha Storm Chasers.
Sep 4, 2021RecalledKansas City Royals recalled C Sebastian Rivero from Omaha Storm Chasers.
Jul 16, 2021OptionedKansas City Royals optioned C Sebastian Rivero to Omaha Storm Chasers.
Jun 20, 2021RecalledKansas City Royals recalled C Sebastian Rivero from Omaha Storm Chasers.
May 14, 2021OptionedC Sebastian Rivero assigned to Omaha Storm Chasers from Kansas City Royals.
May 3, 2021RecalledKansas City Royals recalled C Sebastian Rivero from Omaha Storm Chasers.
Mar 16, 2021OptionedKansas City Royals optioned C Sebastian Rivero to Omaha Storm Chasers.
Nov 21, 2020Contract selectedKansas City Royals selected the contract of C Sebastian Rivero.
Nov 20, 2020Contract selectedKansas City Royals selected the contract of C Sebastian Rivero from Omaha Storm Chasers.
Jul 10, 2015Signed as free agentKansas City Royals signed free agent C Sebastian Rivero to a minor league contract.

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.