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You might know Jim "Bones" Mackay as the hardworking, yet easygoing caddie for Phil Mickelson, but he doesn't like when people make fun of his lunch bucket at Callaway Golf Headquarters.

Jim "Bones" Mackay is more than just Phil Mickelson's caddie. He toils away in the Callaway customer service department in his down time.

Jim "Bones" Mackay never misses a beat while caddying for Phil Mickelson. He's awfully accommodating around the office, too.

In addition to being Phil Mickelson's longtime caddie, Jim "Bones" Mackay also serves as Callaway's expert bag tester. As you'll see, even Bones has his limits.

Callaway Talks Podcast – Interview with Phil Mickelson's Caddy, Jim “Bones” Mackay. #Golf #Podcast

Jim Mackay. "Bones". On Mickelson's bag since 1992.