Tayron Guerrero

RP · R/R · age 35.7 · BOS

XIX-A (POSTED)XX-DSUPER TWO?OCTOBER OK

Roster status
15-DAY IL (Shoulder inflammation)
Service thru 2025
2+004
Service now / projected
2+120 / 2+133
Option years left (2026)
0
Assignments left this season
n/a of 5
Contract (2027)
PRE-ARBITRATION / AUTO-RENEWAL
Acquired
Free Agent (NPB) Jan'26
Outrighted / DFA'd before
1 / 2
Contract
none listed

Next 90 days, by the model

Stays put
94%
Designated
2%
Optioned
<1%
Traded
1%
Released or non-tendered
3%

Pushing the cut risk around: this season's WAR (0.89) lowers it, age (35.68) raises it, this season's ERA (3.26) lowers it.

Context the model does not weigh: 0.9 WAR this season; 13 RP on the 40-man, of whom Aroldis Chapman 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 12 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 3rd among the returners (1.6 WAR against a bar of 0.4), 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 11th (-0.1 WAR, bar 0.0), worth 76% kept on the same model.

By recent record: returning RPProj. WAR
1. Garrett Whitlock3.5
2. Justin Slaten1.6
3. Tayron Guerrero1.6
4. Brayan Bello1.2
5. Erik Miller0.9
6. Alec Gamboa0.8
7. Greg Weissert0.7
8. Tyler Samaniego0.4
9. Zack Kellylast job0.4
10. Wyatt Olds0.2
11. Jovani Moran0.1
12. Raymond Burgos0.1
By ZiPS / Steamer: returning RPProj. WAR
1. Brayan Bello2.0
2. Garrett Whitlock1.1
3. Jovani Moran0.5
4. Justin Slaten0.3
5. Erik Miller0.3
6. Greg Weissert0.2
7. Zack Kelly0.1
8. Tyler Samaniego0.1
9. Raymond Burgoslast job0.0
10. Alec Gamboa-0.0
11. Tayron Guerrero-0.1
12. Wyatt Olds-0.2

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 minorsBLOCKED
Not without his consent: with five years of service (or, for a posted player, a contractual clause) he can refuse the assignment or elect free agency instead. The club's only unilateral moves are to keep him, trade him, or release him.
Article XIX-A: five years, no forced assignment
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, he cannot be outrighted without his consent: he can refuse and force a release with his contract intact, or elect free agency (forfeiting termination pay). 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 likely higher after a Super Two ruling) 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
2017183yesMar 17, 2017 to Oct 2, 2017 (183d, spring training)
2016180yesMar 14, 2016 to May 15, 2016 (42d, spring training)May 18, 2016 to Jul 29, 2016 (72d)Jul 29, 2016 to Oct 3, 2016 (66d, within 24h of trade)
2015183yesMar 16, 2015 to Oct 5, 2015 (183d, spring training)

Transaction log

Sep 1, 2026Status changeBoston Red Sox placed RHP Tyron Guerrero on the 15-day injured list. Right shoulder inflammation.
May 22, 2026Contract selectedBoston Red Sox selected the contract of RHP Tayron Guerrero from Worcester Red Sox.
Jan 9, 2026Signed as free agentBoston Red Sox signed free agent RHP Tayron Guerrero to a minor league contract.
Jan 17, 2024Signed as free agentLos Angeles Angels signed free agent RHP Tayron Guerrero to a minor league contract.
Jan 7, 2023Signed as free agentCincinnati Reds signed free agent RHP Tayron Guerrero to a minor league contract and invited him to spring training.
Jan 10, 2020OutrightedChicago White Sox sent RHP Tayron Guerrero outright to Charlotte Knights.
Jan 2, 2020Designated for assignmentChicago White Sox designated RHP Tayron Guerrero for assignment.
Dec 6, 2019Claimed off waiversChicago White Sox claimed RHP Tayron Guerrero off waivers from Miami Marlins.
Dec 2, 2019Designated for assignmentMiami Marlins designated RHP Tayron Guerrero for assignment.
Sep 1, 2019Status changeMiami Marlins activated RHP Tayron Guerrero from the 10-day injured list.
Aug 9, 2019Status changeMiami Marlins placed RHP Tayron Guerrero on the 10-day injured list. Torn fingernail.
Jul 16, 2019Status changeMiami Marlins activated RHP Tayron Guerrero from the 10-day injured list.
Jun 28, 2019Status changeMiami Marlins placed RHP Tayron Guerrero on the 10-day injured list retroactive to June 27, 2019. Right middle finger blister.
Jul 31, 2018Status changeMiami Marlins activated RHP Tayron Guerrero from the 10-day injured list.
Jul 5, 2018Status changeMiami Marlins placed RHP Tayron Guerrero on the 10-day disabled list retroactive to July 4, 2018. Left lumbar strain.
Oct 2, 2017RecalledMiami Marlins recalled RHP Tayron Guerrero from New Orleans Baby Cakes.
Mar 17, 2017OptionedMiami Marlins optioned RHP Tayron Guerrero to New Orleans Baby Cakes.
Oct 3, 2016RecalledMiami Marlins recalled Tayron Guerrero from Jacksonville Suns.
Jul 29, 2016OptionedMiami Marlins optioned RHP Tayron Guerrero to Jacksonville Suns.
Jul 29, 2016TradedSan Diego Padres traded Andrew Cashner, Colin Rea, RHP Tayron Guerrero and cash to Miami Marlins for RHP Jarred Cosart, RHP Carter Capps, RHP Luis Castillo and 1B Josh Naylor.
May 18, 2016OptionedSan Diego Padres optioned RHP Tayron Guerrero to El Paso Chihuahuas.
May 15, 2016RecalledSan Diego Padres recalled Tayron Guerrero from El Paso Chihuahuas.
Mar 14, 2016OptionedSan Diego Padres optioned RHP Tayron Guerrero to El Paso Chihuahuas.
Oct 5, 2015RecalledSan Diego Padres recalled Tayron Guerrero from El Paso Chihuahuas.
Mar 16, 2015OptionedSan Diego Padres optioned RHP Tayron Guerrero to San Antonio Missions.
Nov 20, 2014Contract selectedSan Diego Padres selected the contract of Tayron Guerrero from Lake Elsinore Storm.

Service through 2025 per FanGraphs RosterResource; options and this-season service reconstructed from the MLB transaction log (reconstruction; FanGraphs shows 0). Rule 5 exposure deadline Nov 17, 2026.