Bochy cautioned that everything's subject to change if the Giants involve themselves in another standoff such as last Saturday's Game 2 of the Division Series at Washington, where San Francisco needed 18 innings and eight pitchers to outlast the Nationals, 2-1.
"If things go a little crazy, we'll have them all on alert," Bochy said. "It's all hands on deck in this series."
Hudson is 4-4 with a 5.26 ERA in 13 career starts against St. Louis. He defeated the Cardinals in his only appearance against them this year, allowing three hits in seven innings on June 1 as the Giants prevailed, 8-0.
Vogelsong owns a 2-6 career mark with a 6.17 ERA in 19 lifetime appearances, including nine starts, against St. Louis. That doesn't include his victories over the Cardinals in Games 2 and 6 of the 2012 NLCS. In both games, Vogelsong yielded one run and four hits in seven innings.
Chris Haft is a reporter for MLB.com. Read his blog, Haft-Baked Ideas, and follow him on Twitter at @sfgiantsbeat. This story was not subject to the approval of Major League Baseball or its clubs.