Complex sentence: Roy Shivers (born July 5,1941 in Hally, Arkansas) was the General Manager of the Saskatchewan Roughriders of the Canadian Football League from December 24,1999 until August 21,2006.
Split into simpler sentences: Roy Shivers (born July 5,1941 in Hally, Arkansas) was the General Manager of the Saskatchewan Roughriders in the Canadian Football League. Shivers had held the job since December 24,1999 until August 21,2006.