Combine first 7 ingredients in a large bowl. Add pork chops and peaches; toss well to coat.
Heat a nonstick grill pan coated with cooking spray over medium-high heat. Remove pork and peaches from bowl, reserving the marinade. Place pork and peaches on grill pan; cook 4 minutes on each side or until pork is done.
While the pork chops cook, place marinade in a microwave-safe bowl; microwave marinade at HIGH 2 minutes. Spoon over pork and peaches.