MIAMI (AP) – Johan Santana and one big inning were all the New York Mets needed.Santana struck out eight in seven dominant innings, David Wright hit a three-run double and New York opened its season with a 7-2 win Monday over the Florida Marlins.If only the Mets had Santana last September, when they blew a seven-game lead in the NL East with 17 games left. The collapse became complete when the Marlins scored seven times off Tom Glavine in the first inning on the season’s final day.Santana – who was traded to the Mets from Minnesota this winter and wound up signing a $137.5 million, six-year contract with New York – didn’t need much help in his debut.The two-time Cy Young winner struck out Hanley Ramirez to begin the game and Matt Treanor to end his outing. Santana (1-0) allowed three hits.Wright and Carlos Beltran each doubled twice for the Mets. Jose Reyes added two hits for New York, which has now won 30 of its last 39 openers.The Mets took command with their biggest inning on an opening day, scoring six runs in the fourth.