In his television work, Rothenberg filmed one of the lead roles, Evan Wexler, in Fox's unaired television pilot Damages, and was also one of the leads, Eddie Caprio, in the comedy series Misconceptions, which also did not air. In 2008, he appeared as David "Augie" Augustine in the comedy-drama series The Ex List. Since 2012, he has had a starring role in the BBC One drama mystery television series Ripper Street, portraying Capt. Homer Jackson. In 2015, he was cast in the pilot of ABC's crime drama series Wicked City as Detective Jack Roth, an officer searching for a serial killer on the Sunset Strip. His role was recast in July 2015 after the show received its ABC airdate, and the role was instead given to Jeremy Sisto.