Mets pitcher Jacob deGrom delivers during the first inning of...

Mets pitcher Jacob deGrom delivers during the first inning of a game against the Marlins on Saturday in Miami. Credit: AP / Lynne Sladky

MIAMI — Mickey Callaway wasn’t happy, but he wasn’t blitheringly angry, either. Another day, another sequence in which pretty much nothing went the Mets’ way. So it goes.

“We’ve hit rock bottom,” the manager said a month ago. “I’m sure the fans would love to see people throwing stuff. We’re not happy with what’s going on, but just because we try to approach it the right way doesn’t mean we’re accepting it.”

Update: It’s gotten worse.

The Mets lost to the Marlins, 5-2, on Saturday to complete the worst June in franchise history at 5-21. Heading into Sunday’s series finale, they are tied with Miami for last in the National League and have the worst winning percentage in the league (.400). Callaway’s crew has lost 10 out of 11 and 22 of 27.

If May was rock bottom, what was June?

“We just have to keep on having daily conversations to try and right the ship,” Callaway said. “It’s difficult right now. I know the players are feeling it. I know the fans are feeling it. We’re going to continue to do everything we can, the staff and organization and the players, to try to get in a better spot than we are. This isn’t acceptable to anybody.”

This time, even righthander Jacob deGrom proved to be human. He allowed three runs in six innings, his second start in a row with those totals. Those are his worst outings — still perfectly good for most any pitcher — since mid-April. DeGrom’s ERA rose to 1.84, still best in the NL.

DeGrom pitched well until he fatigued during a 27-pitch, three-run sixth. Derek Dietrich’s infield single brought Brian Anderson to the plate as the tying run. Anderson got hold of an inner-half changeup and sent it 388 feet to leftfield for a two-run home run, a poor pitch that was the result of deGrom tiring.

“I wasn’t able to finish [changeups], leaving it up,” deGrom said. “It was good early in the game. Later on, just started leaving it over the plate.”

Later in the frame, JT Riddle’s slow roller up the first-base line turned into an RBI single when Flores waited back on it and Riddle sprinted past the ball and the first baseman.

Flores said he knew the ball was going to stay fair but felt he didn’t have a play at any base — not at first with Riddle and not at home with Justin Bour.

“I think Wilmer knew right after he hesitated that he probably should have come and gotten it,” Callaway said.

Said Flores: “[He] would have been safe. I saw the replay, and if I charged the ball and tried to get him at home, he was going to be safe.”

That turned deGrom into the tough-luck loser. He took the blame. “Tonight is on me,” he said. “Just left a pitch up and just a couple mistakes. That’s what it boils down to.”

The Mets’ runs came on two swings: solo homers by Jose Bautista (first inning) and Todd Frazier (sixth inning). They managed six hits in six innings against righthander Pablo Lopez, a Marlins prospect making his major-league debut. Lopez struck out five and walked one.

Sunday marks the halfway point for the Mets, game No. 81 of 162. They haven’t won a series since sweeping Arizona at home May 18-20.

“That was not the goal when we came in,” deGrom said. “The goal was to have the best winning percentage. This is the complete opposite. Nobody is happy with that.

“It’s hard for me to speak to everybody else. I’m definitely frustrated. I’m frustrated with how the night went. I’m tired of losing, to be honest.”