In a large bowl, combine the first six ingredients. Crumble pork over mixture and mix well. Shape into eight patties. Top each with a pineapple slice; wrap with a bacon strip.
Using long-handled tongs, moisten a paper towel with cooking oil and lightly coat the grill rack. Grill burgers, covered, over medium heat or broil 4 in. from the heat 4-5 minutes on each side or until a thermometer reads 160°. Serve on buns.