Juan Carlos Díaz (born February 19, 1974) is a retired Cuban professional baseball first baseman/designated hitter. Listed at 6' 2", 228 lb., Díaz batted and threw right-handed. He spent part of the 2002 season in Major League Baseball with the Boston Red Sox. From 1997 through 2008, Díaz made 936 minor league appearances, hitting for a .301 average (999-for-3209) with 230 home runs and 719 RBI. Diaz played the 2010 baseball season for the Winnipeg Goldeyes in the Northern League. On January 27, 2011, it was announced that he was released by Winnipeg. 2 months later, Diaz retired from baseball.