Derek Holland joined the Giants as a non-roster invitee to spring training. He’ll open the season smack in the middle of their starting rotation.

Manager Bruce Bochy confirmed Monday that Holland, the 31-year-old left-hander, will start the third game of the season Saturday at Dodger Stadium. Holland takes the rotation spot of Jeff Samardzija, who’s sidelined by a pectoral injury.

“It’s huge,” Holland said after his outing Monday night against the A’s. “To get this opportunity is what I was trying to do. I want to show people I’m not done. …continue reading here…