Jayce is a crossfit owner/trainer that annoys Peter Griffin in "Family Guy Lite".
When Peter decides to try to live healthier, Quagmire takes him to crossfit and leaves him with the owner Jayce to go over his nutrition regimen. When Peter admits that pizza is his favorite food, Jayce constantly chuckles and dismisses his choice as unhealthy without being specific until Peter calls him an idiot and leaves.