The visiting St. Louis Cardinals will try to tighten the NL Central race further when they face the Chicago Cubs on Monday.
The second-place Cardinals (17-15) have won three straight games over the first-place Cubs (23-18) at Wrigley Field to move within 1 1/2 games of the division lead.
"I think it's better to be in first than in second, for sure," Cubs manager David Ross said.
"The way I approach this season is, we've just got to get better every day. If we can take that mindset, it doesn't really matter to me that you win the division right now in this playoff format, or you come in second.