Jim "Bones" Mackay

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Jim "Bones" Mackay is an American golf caddie who was the caddie for Phil Mickelson. After 25 years of service, it was announced on June 20, 2017 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.

Mackay was born in England; his family moved to New Smyrna Beach, Florida, when he was seven years old. He played golf for Columbus College in Georgia, followed by a job in the pro shop and bag room at Columbus' Green Island Country Club. There he met and began to caddie for Larry Mize and later Scott Simpson and Curtis Strange, before being hired by Mickelson at the start of his PGA career. Of their long and close relationship, Mickelson has been quoted as saying "Bones is the only guy on the golf course that wants me to play well, so why am I going to sit there and berate him and treat him poorly? He's the only guy trying to work his tail off for me." He is also known for being very strict about cell phones being out during tournament play.

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.

Mackay had both knees replaced in October 2016.

Mackay lives in Scottsdale, Arizona, with his wife, Jen (Olsen) - a friend of Phil Mickelson's wife, Amy, who was introduced to Mackay by the Mickelsons - and their children, Oliver and Emma.

In January 2018, Mackay returned to caddying for one week. He went on the bag of Justin Thomas for the Sony Open in Hawaii after an injury to Thomas' regular caddie Jimmy Johnson.