Drew Leon "Lefty" Rader (May 14, 1901 – June 5, 1975) was a Major League Baseball pitcher. Rader played for the Pittsburgh Pirates in 1921. In 1 career game, he had a 0–0 record, with a 0.00 ERA, pitching in 2 innings. He batted right-handed and threw left-handed.
Rader was born in Elmira, New York and died in Catskill, New York.