Woo-Suk Go elects free agency after Twins DFA, unclaimed on waivers

What happened

Per the MiLB.com transaction log, reliever Woo-Suk Go cleared waivers without a claim and elected free agency over the weekend. The move followed Minnesota's decision to designate him for assignment in order to open a roster spot for top prospect Walker Jenkins, as reported by MLB Trade Rumors.

The sequence closes a brief and turbulent chapter in Go's first taste of major-league baseball — one that began with genuine promise and ended with a command problem that, per MLB Trade Rumors, has trailed him since he crossed over from the KBO in 2024.

Why it matters

Go's path to Minnesota was itself a short one. MLB Trade Rumors reports the Twins acquired him in a minor trade with Detroit at the beginning of July. At the time of the deal, Go had been working out of the Tigers' top affiliate with results worth noticing — a 2.60 ERA, a 29% strikeout rate, and 27 2/3 innings of encouraging work. That résumé earned him his first MLB look.

What followed was a reminder that the jump from Triple-A to the majors has a way of exposing whatever a pitcher has been managing rather than solving. Go appeared in four games for Minnesota, allowing four runs across four innings on eight hits and two walks. The Twins optioned him to Triple-A St. Paul in late July.

Things did not stabilize there. Per MLB Trade Rumors, Go was ejected from his first appearance at St. Paul and subsequently received an eight-game ban for using a foreign substance. When he returned, the command issues that had been the central concern about his game since arriving stateside reasserted themselves sharply: over a three-game stretch, he walked 10 batters in four innings.

That stretch, more than anything else, likely explains why no club put in a waiver claim. A 29% strikeout rate is an asset. Ten walks in four innings is a different conversation entirely.

Where the club stands

The Twins enter Monday at 68-74 (.479), sitting third in the AL Central, 6 games back of the division lead. In the Wild Card picture, they rank 7th, sitting 3.5 games relative to the cut line — a margin that makes every roster decision feel a little more load-bearing than it might in July. Minnesota is riding a one-game winning streak heading into a three-game home series against the Detroit Tigers at Target Field — the same organization that originally held Go's contract before trading him to the Twins two months ago.

The probable pitchers for that series: Taj Bradley against Jackson Jobe on Monday, Andrew Morris against Troy Melton on Tuesday, and Dean Kremer against Drew Anderson on Wednesday.

The roster context around Go's departure is not uncomplicated. The decision to designate him was driven by the arrival of Walker Jenkins, but a week removed from the news that Byron Buxton is out indefinitely with a hip impingement — leaving Minnesota short an outfielder with no timetable for his return — the Twins are navigating a stretch run with meaningful absences and a bullpen that has been reshuffled more than once this summer.

The timing of Go's departure also coincides with a calendar inflection point. Under general league roster rules, clubs expand from 26 active players to 28 beginning September 1, which gives teams a modest amount of additional flexibility to carry arms through the final weeks of the season. That expansion does not change Go's situation — he elected free agency and is no longer in the organization — but it does mean Minnesota has a little more room to work with as it fills out the back of its bullpen for the final push.

Whether that push amounts to anything meaningful from a playoff standpoint is a separate question. At 3.5 games outside the Wild Card cut line, the Twins are not eliminated, but the margin is thin and the schedule is not getting easier.

What we don't know yet

The MiLB.com transaction log establishes that Go cleared waivers and elected free agency, but what comes next for him is unresolved. Whether another organization will extend an offer — at the major-league or minor-league level — is not reported. MLB Trade Rumors flags the command issue as a persistent one since Go arrived stateside in 2024 but does not detail the full arc of that transition. The 28-year-old now has enough of a track record in affiliated ball to be evaluated: the strikeout numbers suggest a weapon, the walk numbers suggest a work in progress, and the foreign-substance ban is part of the recent record any interested club would weigh.

For the Twins specifically, the open question is what the bullpen looks like as September deepens. Go's departure creates a vacancy that the roster expansion window helps absorb, but the club's relief situation — particularly with Buxton's absence adding pressure to the offense — remains something to monitor.

What to watch

Walker Jenkins is the name to follow on the Minnesota side. The Twins designated Go specifically to open a spot for their top prospect, which signals organizational intent regardless of where the club sits in the standings. How Jenkins is used, and whether he sticks on the active roster through the expansion window, will tell you something about how the front office is thinking about this final month.

On Go's side, the free-agency election means he can negotiate with any club. A reliever who posted a 2.60 ERA and a 29% strikeout rate at the Triple-A level — even accounting for the MLB struggles and the suspension — is the kind of arm that tends to find a home somewhere, often quietly, often on a minor-league deal with an opt-out. Whether that happens before rosters expand or after is worth a glance at the transaction wire over the next week.

The Detroit series at Target Field, meanwhile, carries its own small footnote: the Tigers will face a Twins club that is now without the reliever Detroit traded away two months ago, on a field where that reliever never quite found his footing. Baseball has a dry sense of humor about these things. The Posterior Wire desk merely reports it.