Ben Williamson

INF · R/R · age 25.9 · TB

OCTOBER OK

Roster status
ACTIVE
Service thru 2025
0+110
Service now / projected
1+110 / 1+110
Option years left (2026)
2
Assignments left this season
5 of 5
Contract (2027)
PRE-ARBITRATION / AUTO-RENEWAL
Acquired
Trade (SEA) Feb'26
Outrighted / DFA'd before
0 / 0
Contract
none listed

Next 90 days, by the model

Stays put
97%
Designated
1%
Optioned
<1%
Traded
1%
Released or non-tendered
1%

Pushing the cut risk around: this season's strikeout rate (0) raises it, this season's plate appearances (284) lowers it, age (25.89) lowers it.

Context the model does not weigh: ZiPS projects 2.6 WAR, 0.2 WAR this season; 11 OF on the 40-man, of whom Jorge Mateo 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?

TB returns 9 IF on the 40-man once 3 free agents leave; about 8 IF jobs survive a normal winter. By his own recent record he ranks 6th among the returners (0.4 WAR against a bar of 0.0), which the calibrated model turns into 97% kept through the tender deadline. Ranked by ZiPS and Steamer instead, which credit his longer track record, he is 3rd (1.5 WAR, bar 0.5), worth 98% kept on the same model.

By recent record: returning IFProj. WAR
1. Junior Caminero3.9
2. Jonathan Aranda2.5
3. Richard Palacios1.5
4. Ryan Vilade0.8
5. Taylor Walls0.7
6. Ben Williamson0.4
7. Nick Madrigal0.3
8. Jadher Areinamolast job0.0
9. Carson Williams-1.7
By ZiPS / Steamer: returning IFProj. WAR
1. Junior Caminero4.2
2. Jonathan Aranda1.9
3. Ben Williamson1.5
4. Carson Williams1.5
5. Jadher Areinamo0.9
6. Ryan Vilade0.8
7. Taylor Walls0.5
8. Nick Madrigallast job0.5
9. Richard Palacios0.4

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. 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
202560yesJul 31, 2025 to Sep 29, 2025 (60d)

Transaction log

Sep 20, 2026Status changeTampa Bay Rays activated 2B Ben Williamson from the 10-day injured list.
Aug 7, 2026Status changeTampa Bay Rays placed 2B Ben Williamson on the 10-day injured list retroactive to August 6, 2026. Right hamstring strain.
May 29, 2026Status changeTampa Bay Rays activated 2B Ben Williamson from the 10-day injured list.
May 20, 2026Status changeTampa Bay Rays placed 2B Ben Williamson on the 10-day injured list retroactive to May 17, 2026. Low back strain.
Feb 2, 2026TradedSt. Louis Cardinals traded 2B Brendan Donovan to Seattle Mariners for CF Colton Ledbetter, SHP Jurrangelo Cijntje, OF Tai Peete, Draft Pick and Draft Pick.
Oct 21, 2025Status changeSeattle Mariners activated 3B Ben Williamson.
Sep 29, 2025RecalledSeattle Mariners recalled 3B Ben Williamson from Tacoma Rainiers.
Jul 31, 2025OptionedSeattle Mariners optioned 3B Ben Williamson to Tacoma Rainiers.
Apr 13, 2025Contract selectedSeattle Mariners selected the contract of 3B Ben Williamson from Tacoma Rainiers.
Jul 18, 2023SignedSeattle Mariners signed 3B Ben Williamson.

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.