The designer of the supposedly sturdy ship that settled on the ocean floor off South Florida over the weekend stepped forward and accepted the blame Monday.

“I’m the architect of the team,” Mets president of baseball operations David Stearns said at Citi Field. “I’m responsible for it.”

The star-studded Mets, with their $340 million payroll, missed the playoffs with Sunday’s loss to the Marlins , sending the organization into reflection mode as 12 other teams prepare for the postseason.

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The Mets went 38-55 beginning on June 13 (when they were a season-high 21 games above .500) to complete one of t

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