PHOENIX -- The Arizona Diamondbacks announced Tuesday that six minor-league managers will return in 2016.

The organization's roster of managers includes Phil Nevin at Triple-A Reno (3rd year), Robbie Hammock at Double-A Mobile (2nd year), J.R. House at Advanced-A Visalia (2nd year), Mike Benjamin at Single-A Kane County (1st year), Shelley Duncan at Short-Season-A Hillsboro (2nd year), Joe Mather at Advanced-Rookie Missoula (2nd year), Darrin Garner at Rookie AZL D-backs (1st year) and Wil Tejada at Domincan Summer League D-backs (4th year).

Benjamin was promoted to Kane County after one season managing the AZL D-backs.

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The D-backs minor-league system posted the second-best winning percentage (.544) in baseball in 2015, behind only the Astros' .553. Hillsboro and Missoula won league championships, while Visalia and Kane County had winning percentages of .600 or better.

Twelve of the organization's minor-league coaches return, and they'll be joined by nine additions: Mike Lansing and Eddie Oropesa at Mobile; Javier Colina at Visalia; pitching coach Rich Sauveur and Shawn Roof at Kane County; hitting coach Jose Amado at Hillsboro; pitching coach Darwin Peguero and hitting coach Franklin Stubbs at Missoula; and Dan Kelly at AZL D-backs.