But it's not likely.
"We're probably going to use [Dave] Borkowski," Houston manager Phil Garner said, referring to the long man in his bullpen. "I'm just kind of holding out if there's some miraculous recovery [by Oswalt]."
Oswalt was struck on the right wrist by a line drive in his last start and was still unable to move the joint freely on Friday. He's 10-6 with a 3.09 ERA in 18 career starts against the Brewers.
Borkowski is more of an unknown. He has pitched one career inning against the Brewers, allowing no runs on one hit.
The Brewers will go with right-hander Dave Bush, who last started on Monday in Pittsburgh and allowed one run in each of the first four innings on the way to a 4-2 Brewers loss. He has surrendered three or fewer earned runs in each of his three starts this month, which include a pair of wins.
The Brewers are 12-14 when Bush pitches, including 12-12 in his starts.
The team scored a 3-2 win on Friday night thanks to Prince Fielder's two-out single in the bottom of the ninth inning. It was the Brewers' third win in four games, a modest winning trend for a team that has struggled since the All-Star break. Fielder was asked if it could be the start of something special.
"I'm not into that -- momentum and streaks," Fielder said. "If we just keep playing hard and try to capitalize on other teams' mistakes, that's what winning teams do. Hopefully, we can do that more often than not."
With identical records, the Astros and Brewers are four games behind the Reds in the National League Wild Card race.
Pitching matchup
MIL: RHP Dave Bush (8-9, 4.69 ERA)
Bush has been much better at Miller Park, going 5-4 with a 3.65 ERA -- an ERA almost two points lower than his road mark.
HOU: RHP Dave Borkowski (1-1, 3.48)
Borkowski threw six innings during the Astros' 18-inning game with the Cubs four days ago, but he managed to keep his pitch count low and is plenty rested for this spot start.
Player to watch
Gabe Gross, who is the latest player to see action as manager Ned Yost's cleanup hitter, drove in the Brewers' first run on Friday and is hitting .309 (30-for-97) over his last 43 games. Gross has only three home runs in that span. The Brewers are 5-1 in games we go to this year.