The show is hosted and judged by Jane's Addiction guitarist Dave Navarro, with accomplished tattoo artists Chris Núñez and Oliver Peck serving as series regular judges.
Barraza and Richard "Made Rich" Parker, who originally finished the competition in 9th and 10th place respectively, season four contestants Aaron "Bubba" Irwin and Josh "King Ruck" Glover, who originally finished the competition in 11th/12th and 9th/10th place respectively, season five contestant Aaron "Aaron Is" Michalowski, who originally finished the competition in 6th place, season five and season seven contestant James "Cleen Rock One" Steinke, who originally finished both competitions as the runner-up, season six contestants Katie McGowan and Matt O'Baugh, who originally finished the competition in 8th and 3rd place respectively, season seven contestants Christian Buckingham and Picasso Dular, who originally finished the competition in 3rd and 13th place respectively, and season eight contestant Anwon "Boneface" Johnson, who originally finished the competition in 7th place.
The winners of the ninth season of Ink Master were Old Town Ink (Aaron "Bubba" Irwin and DJ Tambe), with Black Cobra Tattoos (Katie McGowan and Matt O'Baugh) being the runners-up.
The judges make their final decision by voting to see who had best tattoo of the day, who's going home and who wins the competition.
The shops critique each other's work to see who had the worst tattoo of the day that will send one of them to the bottom.