Alberto Pedro "Beto" Cabrera (also nicknamed Mago or Mandrake because of his playing skills) (December 16, 1945 – August 12, 2000) was an Argentine basketball player.

Cabrera had been considered the best Argentine basketball player ever before the huge success achieved by Manu Ginóbili playing at the NBA.

Although he had not a stylized physique, his first movements on the field showed that Cabrera was specially skilled to control and pass the ball and he was also able to defend, being an outstanding blocker due to his timing to jump.

Moreover, his experience after many years of career and his permanent interest in the game made Cabrera deserver of nicknames such as "El Mago" (The Magician, in Spanish).

His debut was in the Mundial Extra hosted in Chile in 1966, playing then the 1967 and 1974 FIBA World Championships which took place in Uruguay and Puerto Rico, respectively.