Alvarez (knee) underwent X-rays on Saturday that came back negative, Chandler Rome of the Houston Chronicle reports.

Alvarez was diagnosed with a left knee contusion after exiting Saturday's game against San Diego, and he doesn't appear to be dealing with any structural damage. Manager Dusty Baker is optimistic that the 24-year-old won't require a trip to the injured list, so he should be considered day-to-day.

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