If the season went as planned, Freddy Peralta and Nolan McLean were supposed to be a formidable 1-2 punch at the top of the rotation, a nice combo to start a playoff series with in October.

Of course, it has not, and a day after McLean offered a glimpse of what could have been, Peralta provided a reminder in Toronto that seasons aren’t played on paper.

Peralta (5-7) allowed five earned runs on seven hits over four innings, the Met offense went missing and the Blue Jays (41-46) coasted to a 9-3 victory Wednesday in a rubber game at Rogers Centre on Canada Day. The last-place Mets (36-51) have lost 10 of 12.

Brad Penner-Imagn Images

The Blue Jays scored a run in the first on a Kazuma Okamoto RBI infield single and loaded the bases with one out, but Peralta escaped further damage, ending the inning with a strikeout of Ernie Clement on a 98 mph fastball.

But Clement had his revenge in the third when he connected for an RBI double to make it 2-0 and then rookie Sean Keys followed with a three-run blast that was his first MLB homer in his third game. The Long Island native (Harborfields High School, Greenlawn) made his big-league debut on Saturday.

Toronto added four runs in the seventh off Cionel Perez (Daulton Varsho, RBI single, Myles Straw, three-run homer) to turn a game that already felt out of reach into a laugher.

Carson Benge hit a two-run homer in the eighth, his 10th of the season. He also doubled in the third. Francisco Lindor homered in the ninth, his second in three games.

Stat of the Game

A year after posting a career-best 2.70 ERA over 176 2/3 innings, Peralta’s ERA jumped to 4.81, which ranked 59th of 64 qualified starters in MLB as of the end of the game.

He starts July where he left off in June. He pitched to a 6.39 ERA in five starts last month, which included a game where he allowed 10 earned runs on 10 hits in Philadelphia. A month and two days before the trade deadline, his name is surfacing in rumors.

Player of the Game

The woman who sang “O Canada” was inspiring. Check it out here. Honorable mention to Benge with his homer and double.

On Deck

The Mets are off Thursday. They start a four-game series in Atlanta on Friday with Christian Scott (2-0, 3.20) on the mound. The Braves (49-34) have not announced a starter. Game time on WPIX is 7:15 p.m. ET.