Hunter Greene to undergo elbow ligament surgery, out for most of 2027

Hunter Greene's 2026 season is over, and 2027 is already in serious doubt. The Cincinnati Reds announced that the right-hander will undergo elbow surgery, per Mark Sheldon of MLB.com, with Reds president of baseball operations Nick Krall telling the Cincinnati beat that the procedure will involve Greene's elbow ligament, per Pat Brennan of the Cincinnati Enquirer.

What happened

The Reds announced Greene will have elbow ligament surgery, but the specific procedure remains undetermined — and will stay that way until surgeons are actually inside the joint. Per the report, the choice between a full UCL reconstruction, commonly known as Tommy John surgery, and an internal brace procedure cannot be made until the surgeons get a firsthand look at the extent of the damage to Greene's UCL.

That distinction matters enormously for timeline purposes, though the range of outcomes offers only modest comfort: per the report, an internal brace could see Greene return in around 12 months if there are no setbacks and everything moves smoothly, while a Tommy John reconstruction tends to take closer to 14 months in today's game. Either way, per the report, the better part of the 2027 season will pass without him on the mound regardless of which path the surgeons take.

This will be the second UCL surgery of Greene's career. Per the report, Greene underwent Tommy John surgery in 2019, before his MLB debut — meaning the elbow has history, and the organization has navigated this particular road with him before.

Why it matters

The procedural uncertainty here is not a minor footnote. The internal brace has become an increasingly discussed alternative to full Tommy John reconstruction — it is generally understood to carry a shorter recovery window — but the decision belongs to the surgeons once they can assess the ligament directly. Until that determination is made, the Reds and Greene's camp are operating with a range rather than a date, and the public timeline is similarly open-ended.

What is not uncertain, per the report, is the broad strokes: Greene is done for 2026, and a substantial portion of 2027 is gone regardless of which procedure is performed. For a pitcher who already had UCL surgery once before throwing a pitch in the majors, this represents a significant and compounding interruption to what has been one of the more closely watched careers in the National League.

The Reds, for their part, are making this announcement during a season that has already been resolved in the standings. That context does not diminish the news for Greene personally, but it does shape how the organization will need to think about rotation construction heading into next year — with the understanding that their most prominent arm will not be available for the bulk of it.

The numbers

The Reds enter Saturday at 75-87 (.463), sitting fifth in the NL Central, 28 games back in the division. The Wild Card picture is equally closed: Cincinnati ranks 9th relative to the cut line, 13.0 games out. The club has been eliminated from both the division race and the Wild Card race, and arrives in Washington on a one-game losing streak.

Those numbers frame the organizational moment honestly. This is a team finishing out a difficult season, and the Greene announcement lands not as a playoff-race disruption but as a longer-arc concern — one that stretches well into the planning horizon for 2027.

Where the club stands

The Reds are 75-87 (.463), fifth in the NL Central and 28 games behind the division leader, with both the division and Wild Card paths formally closed. The upcoming schedule sends Cincinnati to Nationals Park, where Chase Burns is the probable starter Saturday against Andrew Alvarez, and Brady Singer takes the ball Sunday against Brad Lord. The club then travels to Rate Field on Tuesday, August 11, where Nick Lodolo is lined up against Sean Burke of the Chicago White Sox.

With the postseason off the table, the remaining schedule functions as a combination of development opportunity and organizational evaluation — the kind of late-season stretch where roster decisions carry more weight for next April than for this October.

What does this mean for the roster?

Under general league rules, a pitcher placed on the 60-day injured list is removed from the 40-man roster count for the duration of that placement, which creates flexibility the club can deploy elsewhere. The nature and expected length of Greene's recovery — most of 2027, per the report — makes a 60-day IL placement the logical administrative outcome under those general mechanics. The Reds have not announced a specific roster designation in the material available; that is a general rulebook note, not a reported fact about this transaction.

What we don't know yet

The central unknown is the procedure itself. Tommy John or internal brace — that answer comes from the operating room, not from a press release. Per the report, the surgeons will make that call once they can directly assess the UCL damage. Until then, the 12-month and 14-month recovery windows represent a range, not a schedule.

It is also not yet reported when the surgery is expected to take place, which would anchor the return timeline more precisely. A 12-month clock that starts in late August 2026 points to a different part of the 2027 season than one that begins several months later. That date has not been reported in the material available.

What to watch

The immediate watch item is the surgical report. Once the procedure is completed and the Reds announce which operation was performed, the recovery timeline will sharpen from a range into something closer to a target. Per the report, an internal brace with no setbacks could mean a return in around 12 months; Tommy John tends to run closer to 14 months. The difference between those two outcomes is meaningful for how Cincinnati constructs its 2027 rotation.

Beyond the timeline, the Reds will need to address rotation depth for next season with the understanding that Greene — regardless of procedure — will not be available for most of it. How the organization responds to that gap, whether through the offseason market, internal development, or some combination, is the longer-term operational question that this announcement puts squarely on the table.

For Greene himself, this is the second time his UCL has required surgical intervention, the first having come in 2019 before he ever appeared in a major-league game, per the report. The road back is a familiar one in its general shape, even if the specific procedure and its precise demands remain to be determined.