Evani was handed his debut at the age of 18 in 1981, going on to wear the "Rossoneri" shirt for the next 13 years. His honours while at Milan included two promotions from Serie B, three Serie A titles, two European Cups, two Italian Super Cups, two European Super Cups and two Intercontinental Cups, scoring the winner against Atlético Nacional in their 1989 triumph, winning the "Man of the Match Award". He left Milan in 1993 to join Sampdoria, the club with which he won the Coppa Italia in 1994, staying there for four years until moving to Serie B side Reggiana in 1997, and ending his career at Carrarese in 1998, in Serie C1.