This is not the news Giants fans were hoping for.

San Francisco manager Bruce Bochy announced on Tuesday that starting pitcher Johnny Cueto is headed for the 10-day disabled list with a sprained ankle he suffered working out over the weekend.

The injury doesn’t sound serious, but it leaves the Giants’ staff thin with Madison Bumgarner out with a broken hand and Jeff Samardizija on the shelf with a pectoral strain. Closer Mark Melancon is also on the DL with a right elbow flexor.

Lefty Andrew Suarez will make his MLB debut on Wednesday in Cueto’s place following Tyler Beede’s Tuesday debut against the Arizona Diamondbacks.

“You know what?” Bochy told the San Francisco Chronicle. “They were in major-league camp. They got a lot of work in. We have a lot of (bullpen) coverage here. Sure, it’s a little unusual for two guys to make their debuts. … But they were in major-league camp competing for jobs, and here they are.”

Cueto’s late status change from Wednesday starter to the DL implies that he’s not expected to miss much time. Samardzija is slated for a minor league rehab start this week, so the Giants pitching depth could be back to a non-critical level sooner than later. Bumgarner, meanwhile, is still looking at a June return at the earliest.

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