Preheat your Yoder Smokers YS640 to 250ºF, set up for smoking.
Score the outside of the bologna chub in a diamond pattern using a small knife, cutting about 1/4”-1/2” deep. Rub the surface with mustard. Season with Plowboys BBQ Bovine Bold. Smoke on the second shelf of the cooker for 3-3.5 hours, until the outside is the desired color.
Glaze the bologna with Big Rick’s Chipotle Ketchup, brushing all over the surface. Continue cooking another 30-45 minutes, until the ketchup is tacky on the surface. Remove from the cooker.
Slice or cube and serve, as desired.