Nationals left-hander Gio Gonzalez (4-1, 3.03 ERA) will oppose Dodgers southpaw Hyun-Jin Ryu (2-5, 3.91) in the opener of a matchup of two of the majors' top clubs. Washington (35-20) sports the second-best mark in baseball behind the Houston Astros, while Los Angeles (35-23) has the fourth-best record.