Isac Silvestre da Silva (born 2 April 2006), simply known as Isac, is a Brazilian professional footballer who plays as a centre-back for São Paulo.
Having started his career at Sport Recife in 2022, Isac was quickly picked up by Red Bull Bragantino, where he played in the youth sectors until the 2025 Copa São Paulo de Futebol Júnior. He made his professional debut in the match against Guarani, on 10 March 2024. On 25 February 2025, his signing with São Paulo FC was announced, initially to play in the under-20 category.
Isac was part of the 2023 South American U-17 Championship champion squad.
São Paulo U20
Brazil U17