 A composed, consistent, intelligence, tenacious, and tactically versatile player, with excellent technique, distribution, Galli was known for his man-marking ability and defensive awareness; an attentive player, he excelled at reading the game, and was usually used as a centre-back, although he was often called on to fill in at any defensive position, and also played at right-back, and as sweeper on occasion.Despite his ability, he often struggled with injuries throughout his career, and predominantly served as a back-up in his later career, following the emergence of younger players.Born in Monza, Galli played for A.C. Milan from 1983 to November 1996, after initially being a member of the club's youth sector.