Jim "Bones" MacKay is a former golf caddie and commentator for NBC.
For 25 years, Bones was on the bag for Phil Mickelson. On June 20, 2017 it was announced that Phil and "Bones" were mutually parting ways. He had been on Mickelson's bag since 1992 including in all five of his major championships - the 2004 Masters, the 2005 PGA, the 2006 Masters, the 2010 Masters, and the 2013 Open Championship.
His nickname, "Bones", was created in 1990 when PGA Tour player Fred Couples couldn't remember the name of the lanky, 6-foot 4-inch Mackay. In 2017 Mackay joined NBC/Golf Channel to serve as a commentator.