Mondesi went 2-for-4 with a double, a solo home run and a stolen base in Wednesday's 2-1 loss to the Pirates.
His two knocks were the only extra-base hits the entire Royals lineup managed on the night. Mondesi has been a bona fide fantasy superstar in September, hitting .324 with four homers, eight steals, 10 RBI and 12 runs in 16 games.