Place a large skillet over medium-high heat with one turn of the pan of EVOO, about 1 tablespoon. Cook bacon in the pan until crispy, about 3-4 minutes, and remove it to a small bowl.
Return the pan with the bacon fat back over the heat, add the ground pork and cook until golden brown and cooked through, about 10 minutes. Add the onion and garlic to the pan and cook until soft, about 5-6 minutes.
While the pork and onions are cooking, in a small bowl, mix together the brown sugar, red wine vinegar, Worcestershire and tomato sauce. Pour into the skillet with the pork and onion, cook about a minute, then stir in pineapple. Season with salt and pepper to taste.