Ten of the 12 teams are locked into the Major League Baseball postseason.
The Detroit Tigers and Kansas City Royals secured playoff spots on Friday night to finalize the American League field.
The National League wild-card race will go down to the final games of the regular season. The New York Mets, Atlanta Braves and Arizona Diamondbacks are level going into Saturday.
The top teams in each league are gearing up for the week-long break that comes with the top two seeds.
However, a first-round bye does not guarantee a spot in the World Series.