The pitcher was taken to Cedars-Sinai Medical Center, where he was examined and released, Los Angeles County Deputy Mark Pope told The Associated Press.
The accident occurred shortly before 8 p.m. PT near the intersection of Sunset Boulevard and Sunset Plaza Drive in the small suburb that borders Los Angeles and Beverly Hills, not far from where Zito has a home in Hollywood Hills.
Sheriff's spokesman Sgt. Joseph Morien said Zito was taken to the hospital "just to be checked out if he had injuries or not."
Giants spokesman Jim Moorehead said Zito was experiencing soreness in his neck and upper body and was scheduled to have an MRI on Thursday morning. Moorehead said the team trainer would also see Zito on Thursday.
A watch commander for the police department said officers were investigating the accident and that Zito was listed on the report as a party to the accident, which means that the officers did not deem him to be at fault.
The Giants arrived in Los Angeles late Wednesday afternoon after playing their final exhibition in San Francisco against the Oakland Athletics.
Zito is scheduled to pitch the fourth game of the season-opening four-game series on Sunday night at Dodger Stadium. He went 2-1 with a 2.30 ERA in six Spring Training appearances.
Jim Street is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.