Eduardo Rivera

SP · L/L · age 23.3 · BOS

60-DAY ILOCTOBER: REINSTATE

Roster status
60-DAY IL (Strained back)
Service thru 2025
0+000
Service now / projected
0+027 / 0+040
Option years left (2026)
3 (using one in 2026)
Assignments left this season
3 of 5
Contract (2027)
PRE-ARBITRATION / AUTO-RENEWAL
Acquired
Free Agent (OAK) Jun'24
Outrighted / DFA'd before
0 / 0
Contract
none listed

Next 90 days, by the model

Stays put
85%
Designated
2%
Optioned
8%
Traded
5%
Released or non-tendered
<1%

Pushing the cut risk around: age (23.26) lowers it, this season's WAR (0.07) raises it, roster status (2) raises it.

Context the model does not weigh: ZiPS projects 0.5 WAR, 0.1 WAR this season; 10 SP on the 40-man, of whom Patrick Sandoval 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?

BOS returns 9 SP on the 40-man once 1 free agent leaves; about 8 SP jobs survive a normal winter. By his own recent record he ranks 8th among the returners (0.2 WAR against a bar of 0.2), which the calibrated model turns into 94% kept through the tender deadline. Ranked by ZiPS and Steamer instead, which credit his longer track record, he is 9th (0.3 WAR, bar 0.3), worth 94% kept on the same model.

By recent record: returning SPProj. WAR
1. Ranger Suarez3.2
2. Garrett Crochet3.1
3. Payton Tolle2.8
4. Sonny Gray2.6
5. Jake Bennett2.0
6. Tanner Houck1.1
7. Kutter Crawford0.8
8. Eduardo Riveralast job0.2
9. Johan Oviedo0.1
By ZiPS / Steamer: returning SPProj. WAR
1. Garrett Crochet5.4
2. Sonny Gray3.4
3. Ranger Suarez3.2
4. Johan Oviedo1.2
5. Payton Tolle1.0
6. Kutter Crawford0.8
7. Tanner Houck0.7
8. Jake Bennettlast job0.3
9. Eduardo Rivera0.3

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: Eligible once reinstated

On the 60-day IL before the cutoff, so he is on the eligibility list. He has served 13 of the 60 required days (eligible to be activated from Oct 31), then must be reinstated to the 40-man and 26-man.

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 while he is on the injured list. He must be healthy and reinstated first; a rehab assignment (20 days, 30 for pitchers, with his consent) is the only way to send him down injured.
Injured players cannot be sent down
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. Because he is on the injured list he cannot be outrighted until he is healthy and reinstated, so a DFA now would have to end in a trade or a release.
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
2026119yesApr 23, 2026 to Jul 11, 2026 (79d)Jul 23, 2026 to Sep 1, 2026 (40d)

Transaction log

Sep 1, 2026RecalledBoston Red Sox recalled LHP Eduardo Rivera from Worcester Red Sox.
Sep 1, 2026Status changeBoston Red Sox placed LHP Eduardo Rivera on the 60-day injured list. Lumbar strain.
Aug 17, 2026Status changeBoston Red Sox placed LHP Eduardo Rivera on the restricted list.
Jul 23, 2026OptionedBoston Red Sox optioned LHP Eduardo Rivera to Worcester Red Sox.
Jul 11, 2026RecalledBoston Red Sox recalled LHP Eduardo Rivera from Worcester Red Sox.
Apr 23, 2026OptionedBoston Red Sox optioned LHP Eduardo Rivera to Worcester Red Sox.
Apr 22, 2026Contract selectedBoston Red Sox selected the contract of LHP Eduardo Rivera from Worcester Red Sox.
Jun 12, 2024Signed as free agentBoston Red Sox signed free agent LHP Eduardo Rivera to a minor league contract.
Jul 21, 2021SignedOakland Athletics signed LHP Eduardo Rivera.

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.