"However Graham is still with us and our thoughts and prayers are with him.''
That illness forced Murray to step down from his role as head coach of Queensland Cup team Wynnum-Manly.
As well as his time at the Cowboys and the Sydney Roosters, Murray coached the Blues in the 2006 and 2007 Origin campaigns and had stints at the helm of the Leeds Rhinos in England, Super League outfit Hunter Mariners and the Illawarra Steelers in the NSW Rugby League.