The Expos have made seven errors in their last two games.
Brad Ausmus of the Astros hit his first home run since July 25, a span of 59 at-bats.
Adam Dunn became the eighth Reds player to hit 40 homers in a season.
Jason LaRue of the Reds was hit by a pitch for the 20th time for the second straight season.
The Brewers have seven runs in their last five games.
The White Sox' victory in the final interleague game gave the American League a 127-125 edge for the season.
Nate Robertson became the first Tigers pitcher since Justin Thompson in 1997 to win 12 games.
A thousand points of light for the Tigers: Catcher Ivan Rodriguez scored his 1,000th run, and designated hitter Dmitri Young smacked his 1,000 hit.