| Duca | |
| Fullname: | Adrualdo Barroso da Silva |
| Birth Date: | 4 May 1934 |
| Birth Place: | Recife, Brazil |
| Height: | 1.71 m |
| Position: | Forward |
| Youthyears1: | 1949–1951 |
| Youthclubs1: | América-PE |
| Youthyears2: | 1952–1955 |
| Youthclubs2: | Flamengo |
| Years1: | 1953–1958 |
| Caps1: | 119 |
| Goals1: | 42 |
| Years2: | 1958–1964 |
| Caps2: | 98 |
| Goals2: | 31 |
| Years3: | 1965–1966 |
| Caps3: | 14 |
| Goals3: | 1 |
| Totalcaps: | 231 |
| Totalgoals: | 74 |
| Pcupdate: | 30 June 2024 |
Adrualdo Barroso da Silva (born 4 May 1934), better known as Duca, is a Brazilian former professional footballer who played as a forward.
A striker revealed by CR Flamengo's youth sectors, Duca played for the club from 1954 to 1958, participating in the conquest of three state titles, making 119 appearances and scoring 42 goals.[1] He later played for Real Zagaroza, after performing prominently in the 1958 Teresa Herrera Trophy with Flamengo, where he was champion of the Inter Cities Fairs Cup and the Generalissimo Cup in the 1963–64 season. He also played one last season for RCD Mallorca.[2]