Matt Kemp will start a rehab assignment with the Class A Rancho Cucamonga Quakes on Tuesday. The outfielder is on pace to return to the Dodgers after the All-Star break, according to manager Don Mattingly. Kemp will DH on Tuesday and will play regularly before participating in the Home Run Derby during the All-Star break. If he suffers no setbacks, he'll return to the Dodgers on July 13.