Mark Derwin (born October 28, 1960) is an American film and television actor. Derwin began his career on Days of Our Lives in 1987 with a minor role as Jeremiah Brown. in 1988, Derwin appeared in the role of Adrian Hunter on the The Young and the Restless (TV series), Derwin was featured in a high-profile storyline the elaborate George Rawlins murder mystery as the scheming psychotic serial killer. Derwin is also known for numerous other soap opera roles.