Major League Baseball's regular season is entering its final days. Barring an unforeseen development, the season will come to a close on Wednesday night. Everyone will then have Thursday off before the wild-card round begins Friday. MLB did away with tiebreaker games this season as part of the introduction of the expanded postseason, meaning there is no possibility for a Game 163 situation.

There may be only three days to go before most of the league enters the offseason, but there's plenty of unfinished business left to settle across the majors. Below, CBS Sports has highlighted five aspects that need resolving before the playoffs begin.

 

1. National League East winner

The Atlanta Braves and the New York Mets played the biggest series of the weekend, a three-game set that saw the Braves sweep and flip a one-game deficit into a two-game lead in the division.

The two sides entered Sunday night's contest tied in the season series at 9-9. With the win, the Braves took control of the tiebreaker. In other words, the Mets can win the division only if they finish with the better outright record. The Braves, for their part, will clinch the division with another win or a Mets loss, whichever comes first.

In addition to being able to hang a division champion banner, the winner will earn a first-round bye as a result of having the second-best record in the NL. The loser, conversely, will have to settle for hosting a Wild Card Series this weekend.

The Braves have the Miami Marlins left; the Mets will play the Washington Nationals.

 

2. Final NL wild-card spot

The Philadelphia Phillies entered Monday two games up on the Milwaukee Brewers with three to play. Furthermore, the Phillies possess the tiebreaker over the Brewers, having won the season series 4-2. 

The Phillies' magic number, then, is down to just one -- either a win on their part, or a loss by the Brewers. Put another way, the Brewers would need to win out and have the Phillies lose out in order to make it to October. 

It's possible -- the Phillies will face a tougher opponent (Houston Astros) than the Brewers (Arizona Diamondbacks) -- but it's highly unlikely.