Pork sausage is loaded with fat and calories and should not be a major source of protein in your diet. A 10-inch-long Polish pork sausage, for example, has 740 calories. Less than 20 percent of the calories in this type of pork sausage come from protein. You'll get 32 grams of protein, which is 128 calories from protein, from a 10-inch Polish pork sausage. About 78 percent of the 740 calories come from fat and about 2 percent come from carbs.