Herz's Tommy John Recovery Stalls: Nationals Face Extended Starter Drought

The Nationals have shelved left-hander DJ Herz from his minor-league rehab assignment after he developed a flexor muscle strain, marking a tangible setback in his recovery from Tommy John surgery performed in late 2025. Skipper Blake Butera confirmed the move, emphasizing that while the new injury is muscular rather than ligament-related, it nonetheless derails the timeline for Herz's return to big-league availability.

Herz underwent his procedure roughly seven months ago, in November 2025, positioning him for a mid-to-late summer return if rehabilitation had progressed on schedule. Flexor strains in post-TJ recovery are common trouble points—the forearm flexor complex absorbs enormous load during pitching, and premature or excessive stress during rehab frequently triggers inflammation that requires a reset. The Nationals' decision to pull him immediately signals appropriate caution; a second setback or hurried return could extend his absence into 2027.

For Washington, this is a roster crunch with real teeth. The rotation is already operating thin, and losing Herz's potential contribution removes a young left-handed arm (a scarce commodity) from contention this season. The team will lean harder on its current five-man group and rely on reinforcements from depth—a situation that typically means elevated workload for established starters and fewer cushion days for rest. Any starter injury in the next 60 days becomes a crisis event.

On the betting side, this dynamic flavors Nationals game-by-game totals and pitcher prop lines. A Nationals team forced to burn bullpen ammunition earlier in games—because their starter exits sooner or pitches with less cushion—will see overs become more palatable when opponent offensive talent is present. Conversely, when the Nationals face weak offenses, the pitching depth squeeze becomes less consequential, and team totals can still run low. Watch for line movement in games where Washington's starting pitcher is scheduled but uncertainty looms about bullpen freshness; sharp books will already be pricing in the depth tax. The absence of Herz's eventual rotation slot means the Nationals' overall ERA profile is downgraded for the remainder of 2026, a structural hit that compounds if injuries continue.