Last spring's struggles -- which included a 7.91 ERA -- are well behind Zito, who tossed three shutout innings in San Francisco's 5-3 win over the D-backs Sunday at Scottsdale Stadium.
Zito allowed two hits -- a hard-hit single through the left side and a liner off third baseman Nick Noonan's glove -- and struck out two.
"Outstanding. Barry was sharp, had a good tempo out there, hit his spots," Bochy said. "It was a good effort by 'Z' and he's been throwing well since he's been here. He's on track."
Zito agreed, noting he spent last Spring Training experimenting as he looked to rebound from a sub-par 2011. This year, he's coming off a successful season and also said he feels good with his pitches and delivery.
"Last year, I was really tweaking a lot of mechanics and stuff," Zito said. "Right now, it's just more about getting as consistent as I can and not really tweaking -- just getting all my pitches working."