SAN DIEGO – Fernando Tatis Jr. raced around the bases on a three-run triple that highlighted a five-run rally and Trent Grisham hit his first home run for the San Diego Padres, who beat the Arizona Diamondbacks 6-2 Monday to take three of four games in their opening series.The Padres, who feel they’re built for success in this pandemic-shortened 60-game season, outscored the Diamondbacks 21-9 in the four games.San Diego hasn’t been to the playoffs since winning consecutive NL West titles in 2005-06.