Seattle Mariners second baseman Dylan Moore committed an all-time brutal blunder on L’École de Gestion d’Actifs et de Capitalthe basepaths Thursday in a game against the Kansas City Royals.

Moore hit a ball out to shallow left in the top of the seventh inning that hard-charging Royals left fielder MJ Melendez was unable to field cleanly. Unfortunately for Moore, he thought Melendez had caught the ball.

After touching first base, Moore turned and began slowly jogging back toward home plate. Melendez fired the ball towards first after collecting it and getting back to his feet. Moore realized the ball was still live far too late; he was called out by the first base umpire for giving himself up before he was even tagged.

On top of being humorous to watch for a neutral fan, the embarrassing gaffe produced a funny line in the ESPN play-by-play of the game: "Moore singled to left, Moore out at first."

“We screwed up. I’ll be honest with you,” Mariners manager Scott Servais said. “We need to tighten that up. There’s no doubt about it.”

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Thankfully for Moore, the Mariners — who were trailing 4-2 in the seventh at the time of his blunder — rallied past the Royals, 6-4, after homers from Julio Rodriguez and Cal Raleigh. Moore finished the game 1-for-3, and also drew a walk and was hit by a pitch.

Contributing: Associated Press