Giants’ Willy Adames Diagnosed With UCL Sprain in Left Elbow, Team Plans MRI for Adrian Houser

The San Francisco Giants’ late-season injury situation took another turn with a diagnosis for shortstop Willy Adames, who has been diagnosed with a sprained ulnar collateral ligament in his left elbow, according to reporting by Susan Slusser of the San Francisco Chronicle. The development matters because the ulnar collateral ligament injury type is often associated with the long-term uncertainty of how quickly throwing mechanics can safely return, even when the initial issue is treated as a sprain rather than a complete tear.

Adames, a key presence in the Giants’ infield, sustained the injury during a slide into home on Sunday, per the report. The timing of the injury is significant for a team planning for the stretch run and whatever comes after, since shortstop is a position with constant demands on the throwing arm, particularly as pitchers and runners change angles and tempos game to game.

The immediate complication for San Francisco is that the elbow in question is in Adames’ left arm, the one described as his non-throwing arm. Because of that detail, the club has not yet reached a determination about surgical treatment, the report indicates. Even without a clear decision on surgery, the next steps typically involve imaging and a careful evaluation of pain, range of motion, and the ability to complete the everyday actions required at shortstop, from quick transfers to frequent throws across the diamond.

In a separate development, pitcher Adrian Houser is headed for an MRI, also per the report. An MRI typically provides a clearer picture of the status of soft tissue injuries and can influence whether a pitcher can continue on a normal schedule, requires an extended recovery period, or needs a different treatment path altogether.

Taken together, the two elbow-related issues create a tougher roster management task for the Giants. In baseball, injuries in or near the throwing arm can ripple outward, forcing changes to the infield alignment, reshaping late-game roles, and potentially accelerating opportunities for depth players who would otherwise have had more time to prepare.

It is also worth noting what is not yet settled. The Slusser report characterizes Adames’ situation as a sprain and emphasizes that surgery has not been determined, and it does not provide additional medical specifics about Houser beyond the plan for an MRI. That leaves open multiple outcomes, including a conservative treatment course or, in the more difficult scenario, a path that resembles common UCL recovery timelines.

For fans and roster planners, the most important next watch is not just whether imaging confirms severity, but how both players respond to the early stages of treatment or evaluation. The Giants’ near-term decisions will likely hinge on whether the injuries affect day-to-day participation, and if so, how quickly they can stabilize the shortstop spot and maintain pitching depth while the club navigates the closing weeks of the season.

If additional updates arrive following the MRI and medical review, the Giants’ next transactions could become clearer. For now, the team appears to be moving in two directions at once: reassessing Adames’ left-elbow sprain to determine whether a surgical decision is even necessary, while also gathering diagnostic information for Houser that could determine whether his role can continue in the immediate future or needs to be adjusted.