Nix has played for eight different teams over a seven-year career, including the Royals, Pirates, and Phillies last year.
The 32-year-old is a career .212 hitter with a .627 OPS.
Brittany Ghiroli is a reporter for MLB.com. Read her blog, Britt's Bird Watch, and follow her on Facebook and Twitter @britt_ghiroli. This story was not subject to the approval of Major League Baseball or its clubs.