Which teams improved and declined the most in 2015?

14 Comments

I was curious about which MLB teams changed their fortunes the most this season compared to last year, so I crunched the numbers.

First, here are the biggest win total improvements from 2014 to 2015:

+24 Cubs
+21 Rangers
+16 Astros
+15 Diamondbacks
+13 Twins
+11 Mets
+10 Blue Jays
+10 Cardinals
+10 Pirates

The top five teams on the biggest-improvement list all had managers in their first season on the job, led by Joe Maddon joining the Cubs after tons of success with the Rays. Also worth noting: Of the nine teams with the biggest win total improvement, seven made the playoffs. Only the Twins and Diamondbacks improved to double-digit games and still failed to make the playoffs.

Now, here are the biggest win total declines from 2014 to 2015:

-20 Athletics
-16 Tigers
-15 Orioles
-14 Brewers
-13 Nationals
-13 Angels
-12 Braves
-12 Reds
-11 Mariners

Not surprisingly, a whole lot of those teams have changed managers, general managers, or both. And a couple more may still do so before the offseason gets underway. Oakland retained manager Bob Melvin despite an MLB-high 20-win dropoff and just promoted Billy Beane from general manager to vice president of baseball operations.