His breakout role came in 2001 with his portrayal of Sgt. Denver "Bull" Randleman in the World War II miniseries, "Band of Brothers." Cudlitz starred on the critically acclaimed, five-season television drama "Southland" as patrol officer John Cooper, a 20-year veteran and training officer. It was picked up by TNT, who aired the remaining episodes of its first season, bringing it back for a total of five seasons. The character struggled with chronic back pain, addiction to pain medication, and ethical issues relating to his partners. Prior to the start of shooting for the show, Cudlitz had a large mole removed from his right upper lip, which had previously been a signature feature of his appearance. The show was cancelled in 2013. Cudlitz won the Critics' Choice Television Award for Best Supporting Actor in a Drama Series for his role in 2013.