Sandoval makes first rehab start, fans three in Worcester return

Patrick Sandoval’s first competitive outing in 656 days was also a concrete roster event: his 3.1-inning rehab start for Triple-A Worcester on April 8 opened the 30-day injury rehab window and put him squarely on Boston’s short-term activation ladder. The left-hander’s assignment to Worcester creates a timeline that, if rehab outings progress, could force a decision by early May about whether to add him to the major-league roster.

Sandoval took the ball against the Columbus Clippers and worked 3.1 innings, throwing 63 pitches with 35 strikes. The line on the box score read 3.1 IP, three hits, three walks, three strikeouts, and all three runs charged as unearned after first-inning defensive miscues. Worcester won the game 8-5, but evaluators keyed on Sandoval’s feel and workload rather than the final score.

Velocity and pitch mix offered the most encouraging detail for evaluators. Sandoval’s fastball averaged in the low-to-mid 92s and topped near 93.5 mph, while he mixed a sweeping breaking pitch and a changeup he used to neutralize left-handed contact. That combination produced three strikeouts and a stretch of settled innings after the error-marred first frame, showing early signs that his stuff can play in live competition even as command remains a work in progress.

The outing follows Sandoval’s June 21, 2024 exit from a major-league start that was later diagnosed as a torn ulnar collateral ligament plus a high-grade flexor tendon tear, leading to UCL reconstruction. Boston signed Sandoval to a two-year, $18.25 million deal on December 23, 2024 while he was rehabbing, and he missed the entire 2025 season before the Worcester assignment began.

Medical and historical context matters: clinical literature and advanced-analytics studies place mean return times after UCL reconstruction near roughly 558 days, with many returns spanning 12 to 18 months and performance often lagging a season or more. Sandoval’s 656-day gap sits beyond many averages, and his first rehab outing fits the common pattern where velocity returns earlier than command and innings capacity. Boston’s medical staff and pitching coaches will therefore prioritize strike percentage, walk rate and incremental innings as they evaluate his next appearances.

Immediate implications are clear for Boston’s roster calculus and fantasy managers: Sandoval removed the largest unknown by proving he can throw multiple innings in competition, but the three walks and a 63-pitch limit in 3.1 innings underscore why the club is treating this as progression rather than a roster-ready audition. If he reduces walks and pushes length across multiple Triple-A outings within the 30-day window, Sandoval could surface as a long-relief option, spot starter, or, with continued ramping, a rotation depth piece later in April or early May. For now, the Worcester start delivered the necessary first proof point without resolving the most consequential question: can he do it again, and repeatedly, under major-league workload demands.