The Mets officially have a Kodai Senga problem.

This didn’t happen overnight. It’s been building for a while now, dating to Senga’s mid-July return from a hamstring strain, which was supposed to be a turning point, in a positive way, for the Mets’ rotation.

But Senga has had the opposite effect, and after he sabotaged another pivotal game in Sunday’s 5-1 loss to the Marlins , there’s no more ignoring the obvious. Senga isn’t getting any better and the Mets are running out of time to play detective.

They’ve reached the brink of considering alternatives, and that syncs up well with Brandon Sproat’s resurgence at Triple-A Syracuse. He struck out nine in seven scoreless innings Saturday to give him a 2.44 ERA in his last 11 starts (70 strikeouts in 59 innings).

We’ll get to Sproat a lit

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