Foster Griffin

SP · R/L · age 31.1 · CLE

OCTOBER OK

Roster status
ACTIVE
Service thru 2025
1+034
Service now / projected
2+034 / 2+034
Option years left (2026)
2
Assignments left this season
5 of 5
Contract (2027)
FREE AGENT
Acquired
Trade (WSN) Aug'26
Outrighted / DFA'd before
0 / 2
Contract
1 yr, $5.5M (2026)

Next 90 days, by the model

Stays put
98%
Designated
<1%
Optioned
1%
Traded
1%
Released or non-tendered
<1%

Pushing the cut risk around: this season's WAR (2.22) lowers it, this season's innings (162.20) lowers it, age (31.13) raises it.

Context the model does not weigh: ZiPS projects 1.2 WAR, 2.2 WAR this season; 8 SP on the 40-man, of whom Foster Griffin 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?

CLE returns 7 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 (1.5 WAR against a bar of 0.0), which the calibrated model turns into 100% kept through the tender deadline. Ranked by ZiPS and Steamer instead, which credit his longer track record, he is 8th (1.6 WAR, bar 0.3), worth 100% kept on the same model.

By recent record: returning SPProj. WAR
1. Parker Messick3.0
2. Gavin Williams1.9
3. Joey Cantillo1.6
4. Tanner Bibee1.3
5. Logan T. Allen0.6
6. Austin Peterson0.2
7. Yorman Gomez0.0
By ZiPS / Steamer: returning SPProj. WAR
1. Tanner Bibee2.5
2. Gavin Williams2.0
3. Joey Cantillo1.4
4. Parker Messick1.4
5. Logan T. Allen1.1
6. Austin Peterson0.6
7. Yorman Gomez0.3

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, 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 15 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 (1 yr, $5.5M (2026)). 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. With real money left on the contract a claim is unlikely; the usual outcome is clearing waivers, then release, with the club paying the balance less what a new club pays him.
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
Let the season end
He becomes an Article XX-B free agent at 9 AM ET the day after the World Series; only the club can talk to him for five days after that. A qualifying offer is possible only if he has been with the club since Opening Day and never received one before.
Article XX-B free agency · Qualifying offer

What the rules say about him

Option years, season by season

SeasonDays on optionOption year usedStints
2022121yesMay 22, 2022 to May 30, 2022 (8d)Jun 3, 2022 to Jun 22, 2022 (19d)Jun 26, 2022 to Jul 10, 2022 (14d)Jul 16, 2022 to Sep 21, 2022 (67d, within 24h of trade)Sep 23, 2022 to Oct 6, 2022 (13d)
20200no (under 20)Mar 10, 2020 to Jul 23, 2020 (0d, spring training)

Transaction log

Aug 4, 2026Status changeCleveland Guardians activated LHP Foster Griffin.
Aug 3, 2026TradedWashington Nationals traded LHP Foster Griffin to Cleveland Guardians for LHP Will Dion, LHP Josh Hartle, OF Nick Mitchell and RHP Kendeglys Virguez.
Jul 13, 2026Status changeNational League All-Stars activated LHP Foster Griffin.
Dec 22, 2025Signed as free agentWashington Nationals signed free agent LHP Foster Griffin.
Nov 15, 2022ReleasedToronto Blue Jays released LHP Foster Griffin.
Oct 6, 2022RecalledToronto Blue Jays recalled LHP Foster Griffin from Buffalo Bisons.
Sep 23, 2022OptionedToronto Blue Jays optioned LHP Foster Griffin to Buffalo Bisons.
Sep 21, 2022RecalledToronto Blue Jays recalled LHP Foster Griffin from Buffalo Bisons.
Jul 16, 2022OptionedToronto Blue Jays optioned LHP Foster Griffin to Buffalo Bisons.
Jul 16, 2022TradedToronto Blue Jays traded RHP Jonatan Bernal to Kansas City Royals for LHP Foster Griffin.
Jul 11, 2022Designated for assignmentKansas City Royals designated LHP Foster Griffin for assignment.
Jul 10, 2022RecalledKansas City Royals recalled LHP Foster Griffin from Omaha Storm Chasers.
Jun 26, 2022OptionedKansas City Royals optioned LHP Foster Griffin to Omaha Storm Chasers.
Jun 22, 2022RecalledKansas City Royals recalled LHP Foster Griffin from Omaha Storm Chasers.
Jun 3, 2022OptionedKansas City Royals optioned LHP Foster Griffin to Omaha Storm Chasers.
May 30, 2022RecalledKansas City Royals recalled LHP Foster Griffin from Omaha Storm Chasers.
May 22, 2022OptionedKansas City Royals optioned LHP Foster Griffin to Omaha Storm Chasers.
May 20, 2022Contract selectedKansas City Royals selected the contract of LHP Foster Griffin from Omaha Storm Chasers.
Dec 11, 2020Signed as free agentKansas City Royals signed free agent LHP Foster Griffin to a minor league contract.
Dec 2, 2020Declared free agentLHP Foster Griffin elected free agency.
Nov 30, 2020Designated for assignmentKansas City Royals designated LHP Foster Griffin for assignment.
Oct 30, 2020Status changeKansas City Royals activated LHP Foster Griffin from the 60-day injured list.
Jul 31, 2020Status changeKansas City Royals transferred LHP Foster Griffin from the 10-day injured list to the 60-day injured list. Left forearm strain.
Jul 28, 2020Status changeKansas City Royals placed LHP Foster Griffin on the 10-day injured list. Left forearm strain.
Jul 23, 2020RecalledKansas City Royals recalled LHP Foster Griffin from Royals Alternate Training Site.
Mar 10, 2020OptionedKansas City Royals optioned LHP Foster Griffin to Omaha Storm Chasers.
Jun 10, 2014SignedKansas City Royals signed LHP Foster Griffin.

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.