One thing about good pitchers facing each other: If one stumbles, the other understands.

Because at some point, they’ve all been there.

What appeared to be a heck of a matchup at Comerica Park on Tuesday night ended up as a heck of a headache for Tampa Bay’s previously unbeaten Matt Moore.

But a 10-1 victory for the Tigers behind Anibal Sanchez.

Moore, who’s been good, wasn’t. That’s the kindest and simplest way of putting it.

The left-hander came into the game with an 8-0 record and a 2.18 ERA. In other words, there was no indication that any team soon would do what the Tigers did to him — and what he did to himself by not throwing strikes.

In two-plus innings, meaning he pitched into the third but didn’t get anyone out, Moore allowed six runs on seven hits and six walks.

His ERA climbed to 2.95 in the process as the Tigers, who’d been 1-5 in their last six games, scored four in the second and two more in the third.

How can a good pitcher suddenly stumble? They’re not robots. That’s one reason.

“We had good at-bats, our patience paid off, said manager Jim Leyland, “and tonight, Matt was out of sync.

“He hadn’t been that way, obviously. He’s been terrific to this point, and probably will be terrific after this point.”

It happens to them all, though, at some point.

You’ve seen Justin Verlander struggle at times this season. But the more immediate comparison is that Moore’s counterpart, Sanchez, has ridden the same roller-coaster recently.

“I know that situation,” he said.

Sanchez was sporting a lower ERA than Moore going into his May 18 start in Texas — only to last just 2.2 innings against the Rangers.

Yet in his next start, Sanchez flirted with a no-hitter against the Minnesota Twins — losing it on Joe Mauer’s single in the ninth.

Then the bumps returned.

In his last start, against the Pirates, Sanchez was both excellent, and far from it, in the same game.

“The big thing tonight,” said catcher Brayan Pena, “is that he told me right away he’d forgotten what happened in Pittsburgh.”

Anyway, just when you’ve figured out pitching, rest assured, you haven’t. That goes for players and fans alike.The game you didn’t expect to happen will.

In fact, it just did.

Or as pitching coach Jeff Jones said, “nine out of 10 great matchups end up as slugfests.”