Benjamin Joseph Schwartz is an American actor and comedian. He is best known for his recurring role as Jean-Ralphio Saperstein on the NBC sitcom Parks and Recreation, his starring role as Clyde Oberholt on the Showtime series House of Lies, and his voice roles as Randy Cunningham in Randy Cunningham: 9th Grade Ninja, Dewey Duck in DuckTales, and Leonardo in Rise of the Teenage Mutant Ninja Turtles. He also appeared many times in the CollegeHumor web series Jake and Amir.