Larry is an American voice actor and radio personality. In 1963, Kenney began his radio career at the age of 15 as a disc jockey at WIRL in Peoria, Illinois. After WIRL, he worked at WOWO, Fort Wayne, Indiana; WKYC (AM, now WTAM), Cleveland, Ohio (1970–1973); WHN, New York City; WYNY, New York City; WJJD (now WYLL), Chicago, Illinois; and WKHK (now WLTW), New York City until 1972. He is also known for his voice work as Lion-O on the 1980s Rankin/Bass cartoon ThunderCats, and Karate Kat, a martial arts blackbelt cat featured as part of The Comic Strip. He was also the voice of Bluegrass in SilverHawks and Dolph in TigerSharks. Kenney also did voice work for several breakfast cereal characters, including Count Chocula and Sonny the Cuckoo Bird. In recent years, he has reprised this role for humorous ThunderCats references on the animated series Family Guy. In the 2011 ThunderCats animated series on Cartoon Network, Kenney returned to the series, but as Claudus, Lion-O's and Tygra's father.

He was the announcer for The Beat 102.7 in the video game Grand Theft Auto IV and K.T.I. Radio in the L.A. Noire. He also gives the voice to JB Cripps in Red Dead Online, the online component of Red Dead Redemption 2.

In 2008, he was hired to do an impersonation of Mark Twain for a gala held by the Mark Twain House and Museum.