Determined to put the last two seasons of relatively poor performances behind him, Mats Hummels showed up and performed in a big way for Borussia Dortmund in the 2015-16 season. Hummels was the anchor of Dortmund's best defense since their title-winning 2011-12 side that only let 25 goals slip by them.
If the German centerback had a more stable partnership at the back, perhaps Dortmund would've pushed Bayern until the final match of the season. However, Hummels spent time throughout the year playing next to Sokratis Papastathopoulos, Sven Bender, Neven Subotic, Matthias Ginter, and Lukasz Piszczek. It's tough to find stability among a rotating cast of partners.
With his already announced transfer to Bayern Munich, it's expected that Hummels will slot right in next to Jerome Boateng and, hopefully, develop into a partnership that will benefit Bayern, and Germany, for years to come.
Four: Mats Hummels
Three: David Alaba, Jerome Boateng
(The voters are the Bavarian Football Works staff including Phillip Quinn, Davis VanOrpdorp, Ryan Cowper, John Bushnell, John Dillon, Valentin King, Victor Coffie, George Rudnik, Mike Lynch, and Luke Zimmermann.)