Karl Gehring, Denver Post file)
Brian McGregor still has difficulty talking about his late son, Keli McGregor. The holiday season is a time when families get together, but for the fifth year Keli won't be part of any McGregor family gathering. In April 2010, Keli McGregor, the president of the Colorado Rockies and looking as if he still could play four quarters on the football field, died in Salt Lake City while on a business trip. The cause of death for McGregor, just 48, was attributed to a rare virus that infected his heart muscle.