Born in Cosenza, Calabria, southern Italy, Garritano played for F.C. Internazionale Milano from Giovanissimi Nazionali under-15 team in 2008-09 season to Allievi Nazionali U17 team in 2010-11 season.
Garritano made 25 appearances for Cesena in 2013-14 Serie B; he also played 3 times in for the winner of the promotion playoffs.