Jimmy Johnson and Jerry Jones mutually agreed to split due largely to their inability to work together.
Johnson’s relationship with Jones began to fall apart in 1993. It started with Jones wanting more say in player personnel decisions. Johnson had sole control over all football decisions and refused to give it up. In March 1993, right after the Cowboys had won their first Super Bowl under Johnson, Jones told the media that any coach could have led the Cowboys to a Super Bowl. This infuriated Johnson. Another incident happened in December 1993, when the Cowboys were getting ready to play the Giants for the NFC East title. Johnson had said he would be interested in the Jacksonville Jaguars’ head coaching position. This led to Jones telling the media that he alone would decide Johnson’s coaching future. They agreed to part on March 28, 1994, after the Cowboys had won their second straight Super Bowl, with Johnson getting a $2 million bonus. To this day, Johnson is not on the Dallas Cowboys “Ring of Honor”. When asked in the summer of 2014 why Johnson was not in the ring of honor despite his two Superbowl victories as coach of the Cowboys, Jones stated: “Disloyalty … I couldn’t handle the disloyalty.”
http://en.wikipedia.org/wiki/Jimmy_Johnson_%28American_football_coach%29
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