Rooney joined CBS in 1949, as a writer for Arthur Godfrey's Talent Scouts, when Godfrey was at his peak on CBS radio and TV. It opened the show up to a variety of viewers. The program was a hit, reaching number one in 1952, during Rooney's tenure with the program. It was the beginning of a close life-long friendship between Rooney and Godfrey. He wrote for Godfrey's daytime radio and TV show Arthur Godfrey Time. He later moved on to The Garry Moore Show, which became a hit program. During the same period, he wrote for CBS News public affairs programs such as The Twentieth Century.