Diamondbacks' task: Cool off hot Marlins
Shortstop Otto Lopez leads the majors in batting average, rookie catcher Joe Mack is coming off a 4-for-4 game, and Miami has won six of its past seveShortstop Otto Lopez leads the majors in batting average, rookie catcher Joe Mack is coming off a 4-for-4 game, and Miami has won six of its past seve