Oswaldo da Silva (14 January 1926 – 25 March 1997), commonly known as Baltazar, was a Brazilian footballer.

Nicknamed Cabecinha de Ouro (Golden Head) by fans for his heading ability, he played as a forward.

He played four matches, scoring three goals, two against Mexico and one against Switzerland.

He is the only player to score in two different opening world cup matches, netting one goal in 1950 and the other in 1954.

This biographical article related to a Brazilian association football forward born in the 1920s is a stub.