Cam Booser

RP · L/L · age 34.4 · TB

OCTOBER OK

Roster status
ACTIVE
Service thru 2025
1+105
Service now / projected
2+040 / 2+053
Option years left (2026)
1 (using one in 2026)
Assignments left this season
4 of 5
Contract (2027)
PRE-ARBITRATION / AUTO-RENEWAL
Acquired
Free Agent (CHW) Jan'26
Outrighted / DFA'd before
0 / 0
Contract
none listed

Next 90 days, by the model

Stays put
95%
Designated
1%
Optioned
3%
Traded
1%
Released or non-tendered
<1%

Pushing the cut risk around: age (34.36) raises it, this season's WAR (0.61) lowers it, this season's strikeout rate (0.30) lowers it.

Context the model does not weigh: ZiPS projects 0.2 WAR, 0.6 WAR this season; 14 RP on the 40-man.

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 14 RP on the 40-man once nobody leaves; about 9 RP jobs survive a normal winter. By his own recent record he ranks 9th among the returners (0.4 WAR against a bar of 0.4), which the calibrated model turns into 93% kept through the tender deadline. Ranked by ZiPS and Steamer instead, which credit his longer track record, he is 11th (0.1 WAR, bar 0.3), worth 93% kept on the same model.

By recent record: returning RPProj. WAR
1. Tyler Wells1.7
2. Bryan Baker1.5
3. Edwin Uceta1.5
4. Cole Sulser0.9
5. Manuel Rodriguez0.9
6. Kevin Kelly0.8
7. Garrett Cleavinger0.7
8. Steven Matz0.6
9. Cam Booserlast job0.4
10. Casey Legumina0.3
11. Ty Johnson0.1
12. Alex Cook-0.2
By ZiPS / Steamer: returning RPProj. WAR
1. Steven Matz1.5
2. Garrett Cleavinger0.8
3. Ty Johnson0.7
4. Tyler Wells0.6
5. Edwin Uceta0.6
6. Bryan Baker0.6
7. Brody Hopkins0.3
8. Kevin Kelly0.3
9. Manuel Rodriguezlast job0.3
10. Cole Sulser0.2
11. Cam Booser0.1
12. Casey Legumina0.1

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. 4 of the five optional assignments for 2026 remain. A 2026 option year is already used (67 days), so further trips this season cost nothing extra. 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. 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
202667yesMar 25, 2026 to May 31, 2026 (67d)
202560yesJul 13, 2025 to Aug 10, 2025 (28d)Aug 13, 2025 to Aug 28, 2025 (15d)Sep 2, 2025 to Sep 19, 2025 (17d)
202434yesJun 24, 2024 to Jul 5, 2024 (11d)Jul 8, 2024 to Jul 12, 2024 (4d)Aug 7, 2024 to Aug 9, 2024 (2d)Sep 14, 2024 to Oct 1, 2024 (17d)

Transaction log

May 31, 2026RecalledTampa Bay Rays recalled LHP Cam Booser from Durham Bulls.
Mar 25, 2026OptionedTampa Bay Rays optioned LHP Cam Booser to Durham Bulls.
Mar 25, 2026Contract selectedTampa Bay Rays selected the contract of LHP Cam Booser from Durham Bulls.
Jan 26, 2026Signed as free agentTampa Bay Rays signed free agent LHP Cam Booser to a minor league contract.
Nov 21, 2025Declared free agentLHP Cam Booser elected free agency.
Sep 19, 2025RecalledChicago White Sox recalled LHP Cam Booser from Charlotte Knights.
Sep 2, 2025OptionedChicago White Sox optioned LHP Cam Booser to Charlotte Knights.
Aug 28, 2025RecalledChicago White Sox recalled LHP Cam Booser from Charlotte Knights.
Aug 13, 2025OptionedChicago White Sox optioned LHP Cam Booser to Charlotte Knights.
Aug 10, 2025RecalledChicago White Sox recalled LHP Cam Booser from Charlotte Knights.
Jul 13, 2025OptionedChicago White Sox optioned LHP Cam Booser to Charlotte Knights.
Jul 13, 2025Status changeChicago White Sox activated LHP Cam Booser from the 15-day injured list.
Jun 20, 2025Status changeChicago White Sox placed LHP Cam Booser on the 15-day injured list. Left shoulder strain.
Dec 21, 2024TradedBoston Red Sox traded LHP Cam Booser to Chicago White Sox for RHP Yhoiker Fajardo.
Oct 1, 2024RecalledBoston Red Sox recalled LHP Cam Booser from Worcester Red Sox.
Sep 14, 2024OptionedBoston Red Sox optioned LHP Cam Booser to Worcester Red Sox.
Sep 11, 2024Status changeBoston Red Sox activated LHP Cam Booser from the 15-day injured list.
Aug 14, 2024Status changeBoston Red Sox placed LHP Cam Booser on the 15-day injured list. Left elbow inflammation.
Aug 9, 2024RecalledBoston Red Sox recalled LHP Cam Booser from Worcester Red Sox.
Aug 7, 2024OptionedBoston Red Sox optioned LHP Cam Booser to Worcester Red Sox.
Jul 12, 2024RecalledBoston Red Sox recalled LHP Cam Booser from Worcester Red Sox.
Jul 8, 2024OptionedBoston Red Sox optioned LHP Cam Booser to Worcester Red Sox.
Jul 5, 2024RecalledBoston Red Sox recalled LHP Cam Booser from Worcester Red Sox.
Jun 24, 2024OptionedBoston Red Sox optioned LHP Cam Booser to Worcester Red Sox.
Apr 19, 2024Contract selectedBoston Red Sox selected the contract of LHP Cam Booser from Worcester Red Sox.
Feb 6, 2023Signed as free agentBoston Red Sox signed free agent LHP Cam Booser to a minor league contract.
Feb 16, 2022Signed as free agentArizona Diamondbacks signed free agent LHP Cam Booser to a minor league contract.
Aug 12, 2013Signed as free agentMinnesota Twins signed free agent LHP Cameron Booser 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.