"I've been told 250 officers, more than twice what is needed at Candlestick, would be available," he said.
Vincent said the chances of the World Series being cancelled or moved out of the Bay area are "totally unlikely."
"The people of San Francisco waited 27 years for this World Series, and what I think we're doing is giving them what they've waited for," Vincent said.
"My judgment is that this community is better served by playing the World Series. But we did consider canceling it. We did give it some thought."
Agnos added: "So did I."
Earlier this week, when Game 3 when still tentatively set for Tuesday, Vincent said he preferred that there would not be an off-day once the series resumed.