ESPN announced today that it has added Ice Cube and John Singleton to its roster of directors for the upcoming documentary series 30 for 30. The series —which premieres Oct. 6 and runs through the end of 2010— will offer up 30 one-hour films, covering an array of sports topics from ESPN’s 30 years of existence. Ice Cube will explore the connection between the Los Angeles Raiders and rap music; Singleton will profile track star Marion Jones. Additional installments are slated to be directed by Alex Gibney (Enron: The Smartest Guys in the Room) and Frank Marshall (Raiders of the Lost Ark), and produced by Morgan Freeman, Spike Jonze, and Johnny Knoxville. The network previously announced that Peter Berg, Barry Levinson, and Ron Shelton have also signed on as directors.