Óscar Marcelino Álvarez (25 May 1948 – 28 April 2016[1]) was an Argentine professional football player.

He played in Argentina for Banfield and Newell's Old Boys between 1968 and 1970 before reappearing in Greece.

In 1972, he played four years for Greek club PAS Giannina, scoring 77 goals and becoming the second highest scorer in the club's history.

In 1976, he was transferred to Greek giants Panathinaikos where he played until 1980, scoring 57 goals and becoming the ninth highest scorer in the club's history.

In 1977 Alvarez was the third scorer of the Greek championship with 19 goals and in 1978 he placed in the second place of scorers with 18 goals.