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.
Baltazar also represented the Brazil national team, including at the 1950 World Cup and 1954 World Cup. 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.