Andrew Murdock, also known as Mudrock, is an American record producer specializing in the rock and metal genres.

He is best known for producing Godsmack's Godsmack and Awake albums. More recently, he has produced successful American metal band Avenged Sevenfold's albums Waking the Fallen and City of Evil, as well as albums for Slunt, The Riverboat Gamblers, Powerman 5000, Eighteen Visions, Unloco, Dave Reffett, Alice Cooper, and 50 Foot Wave's EP, Power and Light. He had also contributed to Linkin Park's early Hybrid Theory EP. Mudrock is based in Los Angeles, and has his own studio in partnership with Scott Gilman: The Hobby Shop. There, he has become involved in the local music community, working with up-and-coming bands including Dante vs. Zombies, Random Patterns, and Woolen.