SAN FRANCISCO — When Matt Cain pondered his future, staying put in San Francisco where his career took off became the top option.

He emerged as an All-Star and front-line starter with the Giants, and helped lead them to an improbable championship two years ago.

Now, Cain has that hefty new contract he so hoped for before opening day — awarded for what he has done and what San Francisco’s brass is confident he will continue to do in a star-studded rotation.

Cain and the Giants agreed Monday to a $127.5 million, six-year contract, the largest deal for a right-handed pitcher in MLB history.

“This is a decision that was made pretty simple for us. It was a process and it was a negotiation. It was good for my family and I to go through all of that,” Cain said. “To be able to know this is probably going to be our lifetime as a Giant, that’s pretty cool for us.”