The Yankees promoted Flores to the major leagues on May 29, 2015. On May 30, in his first major league game, he started in left field against the Oakland Athletics. The Yankees optioned Flores to Scranton/Wilkes-Barre on June 10 when Brendan Ryan was activated from the disabled list. On June 21, 2015, the Yankees called Flores back up to cover for the injured Mason Williams
