Summary: Giants backup catcher Curt Casali talks with Susan about being behind the plate for five consecutive shutouts, analyzes each starter, and provides his thoughts on Buster Posey and the team's fast start. | Giants Splash Newsletter: sfchronicle.com/giantsnewsletter | Unlimited Chronicle access: sfchronicle.com/pod Learn more about your ad choices. Visit megaphone.fm/adchoices
