Andy Mosier began cartooning in the early 1980s when he drew a comic strip called 'Sirius' for a monthly publication, Coyote, in Tucson, Arizona. Coyote was discontinued after a year and Mosier started contributing comics to Tucson Weekly, starting with 'C.L. Dobbs' (1984-1986), and then 'Entropede' (1986-1987). After a one year hiatus from cartooning, he began his third strip for Tucson Weekly, called 'K. Rat', which began in 1988 and is still running today. Mosier also works as a graphic designer for Madden Publishing.