Arthur Penhallow (born December 20, 1943) is a radio presenter who worked in Detroit, Michigan hosting afternoons on rock station WRIF from 1970-2009.
On March 30, 2009, WRIF owner Greater Media announced that the station and Penhallow had been unable to come to terms on a new contract.
Under the name "Cicero Grimes", he worked at WNRZ in Ann Arbor in 1970, and then moved to WRIF's predecessor, WXYZ-FM, which at the time was airing a syndicated progressive-rock format distributed by ABC called "Love".
In January 2009, Penhallow's contract expired at WRIF and he was off the air for more than a month before finally releasing a statement on March 27, on his Facebook page saying: "It appears that my days in Detroit radio are over for now.
"We are disappointed that we couldn't come to a contractual agreement with Arthur," said Greater Media Market Manager, John Gallagher.