GEE: Spent week in Philly last night. (AP)

The night Dillon Gee had in Philadelphia happens to all pitchers. It happened to Stephen Strasburg the other day. It will happen to Matt Harvey. It is premature to worry about Gee two starts into the season. It was not a game worthy of capital punishment.

It was a file-and-forget game.

“There’s not a whole lot to say. A terrible night,’’ Gee told reporters. “But you’ve got to move past it.’’

He’s right, so let’s move on to something worthy of concern.

With Gee’s short outing and Aaron Laffey not getting through five innings Sunday, the Mets’ bullpen has worked 4.2 and five innings in two of the last three games. That’s over the equivalent of an entire game.

The accumulation of innings by the bullpen is already a concern for manager Terry Collins as it indicates a three-fold problem: 1) the Mets have a problem with the back end of their rotation, 2) they lack a quality long man, somebody who can give them three or more innings when a game gets away early, and 3) this will eventually add up to a bullpen meltdown.

That is why Collins took Lucas Duda out of the game in a double-switch in the fourth inning. He explained the need to get two innings out of Greg Burke, and the No. 9 spot in the order was due up second the next inning.

It makes total sense.

Last night was the 51st start of Gee’s career, and he’s gone at least five innings in 47 of them, so let’s not get crazy with him. However, he’s also a No. 3 starter and the Mets need him to get out of the sixth on a consistent basis.

The difference between five and six innings over a full season – considered 34 starts – is 34 innings, or roughly four games. It adds up and if Collins is already thinking of these things, it isn’t an indication of comfort.

That’s why the Mets’ refusal to consider Aaron Harang is puzzling. Since 2005, he’s worked at least 180 innings in all but two years. Three times he’s gone over 200 innings. That’s acceptable for a No. 4 and No. 5 starter. Unless Harang has an injury we don’t know about, if he becomes a free-agent in a week (he was recently designated for assignment) the Mets should be calling him.

The Mets were fortunate to have Harvey to slot in between Gee and Laffey – caused by the off day last week – but that won’t always be the case. If Collins can maneuver it, he should separate Gee and Laffey whenever possible to avoid consecutive short days by the starters.

However, he is limited because there’s also Jeremy Hefner, who is not a proven long haul starter. With the exception of last night and Laffey, the Mets have received strong starts in every game, but that won’t last all season.

Naturally, when the topic is the Mets needing a quality starter the talk turns to Zack Wheeler. Let’s say it one more time about Wheeler: He is not ready.

Wheeler was rocky again last night as he gave up four runs on eight hits and three walks in 5.1 innings and 92 pitches. For Wheeler’s stuff, 92 pitches should translate into eight or nine innings, not one out into the sixth. It doesn’t matter that three of the runs were unearned. The unearned runs indicates Wheeler strained to get out of trouble.

So, unless Wheeler proves he can get himself out of trouble, he won’t be able to get the Mets out of trouble.