William Reilly is a young American midfielder developing within the academy system of MLS club Atlanta United, aiming to make the leap to the first team. Born on December 13, 2002, the 22-year-old is 155 cm tall and weighs 70 kg, a stature that belies his technical prowess and low center of gravity. Reilly's career is in its formative stages, having impressed at youth levels with his dribbling ability, close control, and creative passing. He trains with Atlanta's senior squad and aims to earn his professional debut, contributing to the club's future successes. While yet to claim senior honors, his potential is recognized within the organization. William Reilly's style is that of a classic playmaker, using his agility and vision to unlock defenses, and he represents the next wave of homegrown talent for Atlanta United.