He joined the group after the departure of Joe Walsh and was with the band with guitarist Domenic Troiano and later Tommy Bolin.
Her first single, "(I Don't Want To) Stand in Your Way," was written by Kenner, and is regarded as one of the strongest songs on her self-titled 1977 debut album.
Following his time with the James Gang, Kenner worked with a Toronto-based television musical variety show, Music Machine, for approximately two years, after which he worked with Garry Peterson (drummer for The Guess Who) in an unrecorded R&B band, Delphia.
The record included the dance hit "We All Need Love," Troiano's biggest commercial success.
In 1982, he contributed to one half of a six-song EP, Roy Kenner/The Royals, with three songs co-written with and produced by Domenic Troiano.