Phillies manager Joe Girardi says he is not worried about his job security amid a losing stretch that has dropped Philadelphia 10½ games behind the New York Mets in the National League East.

The Phillies have lost 10 of their past 14 games and ended their seven-game road trip in disappointing fashion Sunday night, when they squandered a ninth-inning lead in a 5-4 walk-off loss to the rival Mets. With their three-game weekend series sweep, the Mets improved to 9-3 against Philadelphia this season.

Girardi, who is in the final year of his three-year deal with Philadelphia, said the loss was "extremely frustrating" but insisted he isn't thinking about his future with the Phillies.

"I don't worry about my job," Girardi said. "I've never worried about my job. I don't worry about my job. I've got to do my job. It's the business of being a manager. I don't worry about it."

The Phillies are 21-27 despite a $233 million payroll — the fourth highest in the majors — and a roster featuring 2021 NL MVP Bryce Harper, star catcher J.T. Realmuto, ace pitchers Zack Wheeler and Aaron Nola, and free-agent newcomers Nick Castellanos and Kyle Schwarber.

Despite the lofty preseason expectations, the Phillies enter Monday closer to the last-place Nationals (18-31) in the NL East than the first-place Mets (32-17) after a 2-5 road trip that included two walk-off losses.