Lubin was born in East side of Los Angeles, California to a family of Lithuanian immigrants and died in Glendale, California. He studied at the UCLA then played in AAU tournaments for about 30 years. In 1997 he entered the UCLA Hall of Fame. He played for Twentieth Century Fox basketball team, with jersey #22.
Lubin became an Olympic champion with the US team in 1936 in Berlin, and a European champion with the Lithuanian team in 1939 in Kaunas. He is often called the "Grandfather of Lithuanian basketball" as he promoted basketball in Lithuania and helped Lithuania to win its second consecutive European championship.