The Yankees Jekyll and Hyde of a season continued in the first game of a doubleheader against the Cardinals on Saturday.

The Bombers’ ugly and sloppy 11-4 loss featured poor performance on the field and an even worse one on the mound. After appearing to turn a corner with his strong outing against the Rangers on June 24 — six shutout innings — Luis Severino was destroyed at Bush Stadium as the last-place Cardinals.

The right-hander lasted just four innings allowing seven earned runs on nine hits and three walks registering just two strikeouts. Paul Goldschmidt’s three-run homer in the bottom of the third got the party started for the Red Birds as Severino seemed to be unable to find his groove after surrendering the long ball. Nolan Gorman also blasted a 415-foot two-run homer in the fourth.

The 29-year-old’s ERA ballooned to 6.30 during the final season on his contract as he’s set to hit free agency this winter.

The Bombers’ registered two errors in the field, one from Oswaldo Cabrera who had the opportunity to turn a double play in the third but misfired on the throw to second into right field. Reliever Matt Krook — who came in for Severino in the fifth — threw away another double play in the fifth where the game got completely out of reach as the Red Birds put up a five spot.

Despite the blowout, the first game resumed after a two-plus hour rain delay — a day after Friday night’s game was postponed — as the Yanks continue to battle weather issues during their weekend stay in St. Louis.

Josh Donaldson made his MLB debut on the mound in the ninth inning of game one. The third baseman tossed a perfect frame reaching up to 86 mph on his fastball. Jake Bauers added a two-run homer in the ninth before game one went final at 11-4.

Aaron Boone will turn to the stable in game two of the doubleheader — which features another unfavorable weather forecast — as the Bombers plan to have a bullpen game. Matthew Liberatore, who was Friday’s scheduled starter, will take the ball for Oli Marmol in the nightcap. The Southpaw owns a 5.60 ERA this season.

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