Wílliam Ruben Martínez Carreras (January 13, 1928 – December 28, 1997) was a Uruguayan footballer. He played 54 times for the Uruguay national football team between 1950 and 1965.
Martínez came through the youth team of local side Sportivo Alba de Victoria and signed on as a youth player for Nacional in 1962. After playing for Nacional at various youth levels and for the first team he joined Racing Club de Montevideo in 1947.
In 1948, he joined Rampla Juniors, where he spent 7 seasons before joining Peñarol
It was with Peñarol that Martínez enjoyed most of his success at the club level. During his time with the club he captained the team to five consecutive league titles (1958–1962), two Copa Libertadores (1960, 1961), the Copa Intercontinental in 1961 and four consecutive editions of the Copa Uruguay (1958–1961).
In 1963 Martínez returned to Rampla Juniors, in 1967 he joined Atlético Junior in Colombia before returning for a third spell with Rampla Juniors.
In the last years of his playing career he worked as the player-manager of Fenix and Central Español. He retired from football in 1970 at the age of 42.
International career
Martínez was in the Uruguay squads for three FIFA World Cup tournaments (1950, 1954 and 1962). He played a total of 54 matches scoring 2 goals.
Martínez won the Copa América with Uruguay in 1956, he also played in three other editions of the tournament (1953, 1955 and 1959A).
Honours
Nacional
Primera División Uruguaya: 1943, 1946
Torneo de Honor: 1943, 1946
Torneo Competencia: 1945
Copa de Confraternidad Escobar – Gerona: 1945
Copa Aldao: 1946
Rampla Juniors
Torneo Competencia: 1950
Torneo Cuadrangular: 1953
C.A. Peñarol
Primera División Uruguaya: 1958, 1959, 1960, 1961, 1962
Torneo Competencia: 1956, 1957
Torneo de Honor: 1956
Cuadrangular Tournament: 1955, 1957, 1959, 1960
Cuadrangular in Mexico: 1957
Copa Libertadores: 1960, 1961
Intercontinental Cup: 1961
Uruguay
1950 FIFA World Cup: 1950
1956 South American Championship: 1956
Individual
FIFA World Cup All-Star Team: 1954
IFFHS Uruguayan Men's Dream Team (Team B)