Place the chops between two large sheets of plastic wrap. Using a mallet or rolling pin, lightly pound the chops into 1/4-inch-thick cutlets. Allow the cutlets to stand at room temperature for 20 to 30 minutes before grilling. Lightly brush or spray both sides of the cutlets with oil and season with the rub. Grill over Direct High heat for 2 minutes, turning once. Transfer the cutlets to a cutting board and cut each in half. Fill each pita half with pork, lettuce, tomatoes, and cucumber. Spoon the sauce inside. Serve warm.