Place pork tenderloin and herb sprigs in a zip top bag. Pour marinade over meat. Seal bag and place in refrigerator to marinate for 1 hour.
30 minutes prior to grilling, remove tenderloin from fridge and place on counter to gently warm up.
Heat grill to medium high heat. Place tenderloin on grill. Cook for 5 minutes on first side until grill marks appear. Turn tenderloins and cook for 5 minutes. Continue turning so that each side of the tenderloins are grilled. Cook tenderloins a total of about 30 minutes or until internal temperature reaches 150 degrees.
Remove from heat, tent with foil and let rest for 10 minutes. Slice and serve with juices.