DO-AHEAD TIP: Marinate lamb chops overnight or for at least 4 hours (see recipe).
In a medium bowl, whisk together first 7 ingredients (orange juice through salt).
Place lamb chops in a large zipper-topped plastic bag; pour marinade on top. Seal bag, turn to coat and refrigerate overnight or for at least 4 hours.
Preheat outdoor grill to MEDIUM-HIGH. Remove lamb chops from marinade, discarding marinade and bag.
Grill chops for 4 minutes per side or until done.