Remove the pork loin from the refrigerator in the morning and prepare your marinade
Mix together apple juice, honey, brown sugar, Traeger Pork Rub, pepper, and oregano, in a saucepan. Cook over medium heat for about 5 minutes, or until sugar is dissolved.
Trim fat from pork loin, and using a sharp knife score the loin going about 1/4 inch deep, and 1 inch apart. Repeat going the opposite way.
Place the loin in a deep pan, and pour the marinade over the loin. Refrigerate for 3 hours, flipping the loins halfway through.
Preheat the pellet smoker to 225°F using mesquite pellets
Place the pork loin on the smoker and smoke for 2 hours or until it reaches an internal temperature of 145°F.
Remove the pork loin from the smoker and let it rest for 10 minutes. Slice the pork loin and serve with BBQ sauce, if desired.