The previous day, Roenicke had scratched Gallardo from a scheduled Wednesday start to allow him to be ready to pitch in Game 1 on Saturday. Instead, Gallardo threw a couple of simulated innings in an early workout as a tuneup.
Roenicke plans to start right-hander Zack Greinke on Wednesday on short rest. The Brewers need to win to be assured home-field advantage in the first round -- they lead Arizona by one game.
If Greinke goes deep in that game, Roenicke said he won't pitch until Game 3 of the NLDS. In that event, Greinke said right-hander Shaun Marcum would pitch Game 2.
"The plan is not for sure," said Roenicke.
As for selecting Gallardo for Game 1, Roenicke said, "It kind of lined up that way, we thought. He has pitched really well lately, and it seemed to line up better that way."
Gallardo went 17-10 with a 3.52 ERA in 33 starts but was particularly sharp in his final three outings, going 2-0 with a 1.77 ERA and 36 strikeouts in 20 1/3 innings.
Roenicke said Gallardo's postseason experience in '08, brief as it was (seven innings), played a role in the decision. Greinke and Marcum have not pitched in the playoffs.