At this rate, it would be easier to list who’s not injured on the Mets.

Yoenis Cespedes was forced to leave the game after the fifth inning of Wednesday’s 4-3 win over the Kansas City Royals with discomfort in his left wrist. He joined Noah Syndergaard (elbow) on a trip to the Hospital for Special Surgery in Manhattan to have it evaluated.

Cespedes was diagnosed with a mild sprain. He received a cortisone injection that should sideline him for a couple of days, but he is expected to avoid the disabled list, the Mets said.

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Cespedes, who left before he could speak to reporters, conveyed via a spokesperson that he wasn’t worried about the injury (he also hurt his left wrist last year, before the Mets traded for him). It originally appeared that he hurt it while fouling off a ball in his fifth-inning at bat, but the team said it wasn’t the case.

“I don’t know what the issue is,” manager Terry Collins said right after the game. “I’m certainly concerned about it.”

Colon OK, Wheeler gets cortisone shot

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It’s what we’ve thought all along: Bartolo Colon is made of steel.

Well, not quite steel, but as it turns out, he’s made of some hearty stock. Colon, who took a nasty line drive off his pitching thumb on Tuesday, suffered only a bruise, and is still slated to pitch on Sunday, Collins said. And because he threw only four pitches, it’s possible the Mets might use him in a relief role, to boot.

“We dodged a big one,” Collins said. “Bartolo eats up innings, boy, and they’re quality innings. If we had lost him, we could have been in big trouble.”

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Colon’s titanium thumb is especially fortuitous, considering Zack Wheeler’s recent backslide. Wheeler was experiencing elbow discomfort and had to scratch his appearance in a Gulf Coast League game.

Wheeler received a cortisone injection for sensory nerve irritation at the Hospital for Special Surgery, but the Mets believe his surgically repaired elbow is sound.

“Every little twinge is an issue for those guys,” Collins said. “It’s ‘how come I don’t feel great’ and I think it takes a little time to realize that you’re going to be OK.”

Extra bases

The Mets recalled Logan Verrett and optioned Ty Kelly to Triple-A Las Vegas to provide a bit of a cushion in the bullpen. The bullpen worked 8 2⁄3 innings Tuesday, including a career-high 3 2⁄3 innings from Hansel Robles.