Phil Mickelson's longtime caddy Jim 'Bones' Mackay

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SCOTTSDALE, Ariz. -- Jim Mackay -- you might know him as "Bones" -- has been caddying for Phil Mickelson for more than 15 years.

Tara Hitchcock and Scott Pasmore caught up with Bones at TPC Scottsdale before Thursday's first round play. They talked not only about the infamous 16th hole, but also about what the cold means for the players and their caddies.