Tsung-Che Cheng

SS/2B/3B · L/R · age 25.1 · BOS

OCTOBER OK

Roster status
OPTIONED
Service thru 2025
0+010
Service now / projected
0+041 / 0+041
Option years left (2026)
1 (using one in 2026)
Assignments left this season
4 of 5
Contract (2027)
PRE-ARBITRATION / AUTO-RENEWAL
Acquired
Waivers (WSN) Feb'26
Outrighted / DFA'd before
0 / 4
Contract
none listed

Next 90 days, by the model

Stays put
37%
Designated
51%
Optioned
10%
Traded
1%
Released or non-tendered
1%

Pushing the cut risk up: this season's WAR (0.04) raises it, roster status (3) raises it, last season's WAR (-0.14) raises it.

Context the model does not weigh: ZiPS projects 0.4 WAR, 0.0 WAR this season; 15 OF on the 40-man, of whom Isiah Kiner-Falefa 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 15 IF on the 40-man once 1 free agent leaves; about 8 IF jobs survive a normal winter. By his own recent record he ranks 12th among the returners (-0.2 WAR against a bar of 0.6), which the calibrated model turns into 83% kept through the tender deadline. Ranked by ZiPS and Steamer instead, which credit his longer track record, he is 14th (0.2 WAR, bar 0.7), worth 87% kept on the same model.

By recent record: returning IFProj. WAR
1. Willson Contreras3.5
2. Caleb Durbin2.8
3. Nick Sogard1.7
4. Trevor Story1.7
5. Curtis Mead1.3
6. Romy Gonzalez1.1
7. Nathan Eaton1.0
8. Mickey Gasperlast job0.6
9. Masataka Yoshida0.6
10. Anthony Seigler0.5
11. Andruw Monasterio-0.1
12. Tsung-Che Cheng-0.2
By ZiPS / Steamer: returning IFProj. WAR
1. Caleb Durbin2.4
2. Trevor Story2.0
3. Willson Contreras1.7
4. Kristian Campbell0.9
5. Nathan Eaton0.8
6. Romy Gonzalez0.8
7. Mickey Gasper0.7
8. Curtis Meadlast job0.7
9. Andruw Monasterio0.7
10. Masataka Yoshida0.6
11. Triston Casas0.6
12. Nick Sogard0.6

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 (143 days), so further trips this season cost nothing extra. 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
2026143yesMar 19, 2026 to Jun 26, 2026 (93d, spring training)Jul 27, 2026 to now (50d)
2025186yesMar 11, 2025 to Apr 7, 2025 (20d, spring training)Apr 16, 2025 to Sep 29, 2025 (166d)
2024195yesMar 12, 2024 to Oct 1, 2024 (195d, spring training)

Transaction log

Jul 27, 2026OptionedBoston Red Sox optioned SS Tsung-Che Cheng to Worcester Red Sox.
Jun 26, 2026RecalledBoston Red Sox recalled SS Tsung-Che Cheng from Worcester Red Sox.
Mar 19, 2026OptionedBoston Red Sox optioned SS Tsung-Che Cheng to Worcester Red Sox.
Feb 6, 2026Claimed off waiversBoston Red Sox claimed SS Tsung-Che Cheng off waivers from Washington Nationals.
Jan 30, 2026Designated for assignmentWashington Nationals designated SS Tsung-Che Cheng for assignment.
Jan 28, 2026Claimed off waiversWashington Nationals claimed SS Tsung-Che Cheng off waivers from New York Mets.
Jan 21, 2026Designated for assignmentNew York Mets designated SS Tsung-Che Cheng for assignment.
Jan 16, 2026Claimed off waiversNew York Mets claimed SS Tsung-Che Cheng off waivers from Tampa Bay Rays.
Jan 12, 2026Designated for assignmentTampa Bay Rays designated SS Tsung-Che Cheng for assignment.
Jan 7, 2026Claimed off waiversTampa Bay Rays claimed SS Tsung-Che Cheng off waivers from Pittsburgh Pirates.
Dec 19, 2025Designated for assignmentPittsburgh Pirates designated SS Tsung-Che Cheng for assignment.
Sep 29, 2025RecalledPittsburgh Pirates recalled SS Tsung-Che Cheng from Indianapolis Indians.
Apr 16, 2025OptionedPittsburgh Pirates optioned SS Tsung-Che Cheng to Indianapolis Indians.
Apr 7, 2025RecalledPittsburgh Pirates recalled SS Tsung-Che Cheng from Indianapolis Indians.
Mar 11, 2025OptionedPittsburgh Pirates optioned SS Tsung-Che Cheng to Indianapolis Indians.
Oct 1, 2024RecalledPittsburgh Pirates recalled SS Tsung-Che Cheng from Indianapolis Indians.
Mar 12, 2024OptionedPittsburgh Pirates optioned SS Tsung-Che Cheng to Altoona Curve.
Nov 14, 2023Contract selectedPittsburgh Pirates selected the contract of SS Tsung-Che Cheng from Altoona Curve.
Jul 2, 2019Signed as free agentPittsburgh Pirates signed free agent SS Tsung-Che Cheng 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 1). Rule 5 exposure deadline Nov 17, 2026.