Yes, but note that you will likely need to increase the bake time. Slice the raw sausage before prepping the veggies, arrange them in a single layer on your sheet pan, and start cooking them before everything else. This will give them enough time to cook all the way through and finish cooking at the same time as the veggies. Pork sausages are fully cooked when they reach an internal temperature of 155-165 degrees F. You'll want to make sure you flip them over while they cook so that they can get crisped up on both sides.