As one of the key players of the Paraguay national football team in the early 1930s, he gained the attention of Argentinian club Boca Juniors and signed with them in 1932.

He soon became one of the key players in the team and during the seven years he spent at the club he scored 107 goals in 162 matches, making him the fifth all-time top scorer in Boca Juniors' history [1].

Near the end of his football career, Benítez also played for Argentinian sides Racing Club (1939–41) and Ferro Carril Oeste (1941–44).

During his time at Racing he became the top scorer in the Primera División Argentina and in South American football for 1940 with 33 goals, tied with Isidro Lángara of San Lorenzo.

After retiring from football as a player, he became a coach and led Independiente Medellín to a Colombian national championship in 1955.