San Diego rookie Ryan Weathers makes his first big league start when Mookie Betts and the champion Dodgers visit Petco Park in the first matchup this season between the NL West rivals. Los Angeles swept the Padres in the NL Division Series last year, and both teams added more stars in the offseason. Walker Buehler is lined up to pitch for the Dodgers, who own the best record in the majors this year.