By | Mercury News, Bay Area News GroupMatt Cain has talked openly of his lifelong dream of throwing a perfect game. It’s no longer just a dream.Cain threw the first perfect game in the Giants’ long and storied history Wednesday night at AT&T Park, striking out 14 and getting great defensive plays from outfielders Melky Cabrera and Gregor Blanco in a 10-0 victory over the Houston Astros.Cain, the longest-tenured Giant, has been through it all in his eight seasons in San Francisco. He has seen highs — a World Series title in 2010 — and lows — dozens of losses on nights when he was...…By | Mercury News, Bay Area News GroupMatt Cain has talked openly of his lifelong dream of throwing a perfect game. It’s no longer just a dream.Cain threw the first perfect game in the Giants’ long and storied history Wednesday night at AT&T Park, striking out 14 and getting great defensive plays from outfielders Melky Cabrera and Gregor Blanco in a 10-0 victory over the Houston Astros.Cain, the longest-tenured Giant, has been through it all in his eight seasons in San Francisco. He has seen highs — a World Series title in 2010 — and lows — dozens of losses on nights when he was...WW…