From one year to the next, you never truly know what to expect in any given division race around baseball. Sometimes one team will completely blow away the rest of the teams in their division and run away with the first place spot, while other cases see multiple teams within a few games of each other down to the last game of the season. This year is more of the latter.
Of the six divisions, four of them have the second place team within three games of the first place squad (the Royals and Cardinals lead their divisions by a good margin). Furthermore, some of the teams closing in on first — or in some cases leading the division — haven’t been doing so well in quite a long time. 
The biggest example of that being the Astros and Mets. Each are leading their given divisions at the current moment, and each are making their push towards the playoffs years earlier than many people thought they would.
With the Angels a mere one game back of the Astros and the Nationals a game and a half removed from the Mets, the remaining games of the season should be exciting as we find out which teams can hold on to their hot seasons.
Although not in first place (at least not yet), the Blue Jays are another team that is making things very interesting in the race for first place. The Yankees, somewhat surprisingly, lead the American League East at the moment, but the surging Jays are right on their tail, at just one and a half games back. With the lineup they have, Toronto has the ability to overthrow the Yankees as the season progresses.
The Dodgers are also in the mix as far as exciting division races are concerned, despite still holding a two and a half game lead over the Giants for first. Even so, the Dodgers have been in somewhat of a slump lately (as have the Giants) and things could quickly switch around in the NL West.
No matter what happens over the coming several weeks as teams push towards October, the fact that so many teams that weren’t expected to make the playoffs in 2015 are currently on their way to doing just that is exciting. If the season ended today, the Yankees, Royals, Astros, Blue Jays, Angels, Mets, Cardinals, Dodgers, Pirates and Cubs would all be headed to the postseason.
With the Astros not having made the playoffs since 2005, the Mets since 2006, Cubs since 2008 and the Blue Jays since way back in 1993, this could turn out to be the season a lot of droughts could be broken for a lot of teams. That’s worth looking forward to.
The Unbiased MLB Fan 
Love your blog. Good points but the Dodgers will win their division again this year.
Thanks! I think they’ll be able to hold on as well, but you never know.
Its going to be a great playoff year with all these teams vying to get in after years of droughts. I hope the Astros and Jays can each make it out of the opening round.
It really is. That would be great. I, personally, would love to see a World Series with either the Mets or Cubs taking on the Blue Jays or Astros. Admittedly, however, that’s a long shot.