Initially gaining fame for his role as Tom Cleary on the Steven Soderbergh-directed TV series The Knick, Sullivan would go on to land a series regular part on NBC's This Is Us before being cast as Taserface in Guardians of the Galaxy Vol. 2. He graduated from Loyola Marymount University with a Bachelor of Fine Arts degree in Theatre Arts in 2002. His feature length film debut was for the 2008 Sundance Film Festival nominated movie North Starr.
