Complex sentence: On July 15,2008, CBS announced that Packer would be replaced on the network's lead broadcast crew by Clark Kellogg, marking the end of 35 straight years of Packer covering the NCAA tournament as a TV analyst.
Split into simpler sentences: On July 15,2008, CBS announced that Packer would be replaced by Clark Kellogg on the network's lead broadcast crew. This marked the end of 35 straight years of Packer covering the NCAA tournament as a TV analyst.