Preheat over to 425
In a small bowl, combine orange juice, brown sugar, mustard, worcestershire and salt. Whisk.
Reserve 1/3 liquid for halfway through the cooking so you can re-glaze.
Place in oven, on top shelf, for 15 minutes.
Lower oven temperature to 375 and continue cooking until internal temperature is 145 degrees.
Bake for about 15 minutes per pound. To note, this pork took 50 minutes total to cook and it was 2.4 pounds.
Remove from oven.
Loosely tent it with foil and let it rest for 10 minutes
Slice and enjoy. Serve with pan juices.