Arturo is a member of the Tappahonnock Ham Society.
In "Hamerican Dad!", Stan is happy when a fellow member of the society passes away because it gives him an opportunity to move up in the ranks. However, it also creates an opening and Roger begs him for a chance to join. Stan goes along, figuring Roger will flop in his interview and at least take the pressure off of him. Indeed, Roger's initial interview bombs, so he comes back with a musical number that allows him to get in the club.
To Stan's further frustration, he is outspoken at meetings, getting the entire club to go to Six Flags Amusement Park where Arturo high-fived Speedy Gonzales. When Stan vents at him, Roger sends Arturo on his way and encourages the former to just take anything he wants, having stole Arturo's 2-Year Ham directly from him. Stan admits he aspires to become the head carver, but Roger's encouragement to try for the position turns out to be a setup to embarrass him and secure the carver position for himself.
As Roger prepares his ham for the group, Stan sabotages it by injecting poison. But after having skipped the serving session, he finds the club members on death's door. Together with Roger, they take the members up to Maine to try to get them healthy in the fresh air. After Arturo is nearly lost below the porch, they further try to rejuvenate them after an extended period with a fresh ham, but they relapse with sickness. Stan admits that he poisoned the first ham, as Roger admits he poisoned it even further, as well as their water, so that they could stay in Maine together for an extended time. Having stopped the poisoning, the members start to recover, as Roger decides to poison them again to extend their trip.