Stir together first 5 ingredients in a shallow dish or heavy-duty zip-top plastic bag; remove 1/2 cup mixture, and set aside. Prick pork several times with a fork, and place in remaining mixture. Cover or seal, and chill 1 hour.
Remove pork, discarding marinade.
Grill, covered with grill lid, over medium heat (300° to 350°) 11 to 13 minutes on each side or until a meat thermometer inserted into thickest portion registers 160°, basting with reserved 1/2 cup mixture.
NOTE: To serve 4, double all ingredients, and proceed as directed.