Phil Mickelson Parts Ways with Caddie Jim 'Bones' Mackay After 25 Years

Phil Mickelson has agreed to a "mutual split" with longtime caddie Jim "Bones" Mackay, according to Bob Harig of ESPN.

The duo had been together for 25 years, including 41 of Mickelson's 42 career wins on the PGA Tour, before splitting up Tuesday.

Mickelson's younger brother, Tim, will take over as his caddie.

Tim Mickelson was the golf coach at Arizona State for five years, leading the team to two top-10 finishes.

While Phil Mickelson did not participate in this week's U.S. Open—instead opting to see his daughter's graduation—he decided it was the right time to make a change.

"After 25 very rewarding and memorable years, Bones and I have mutually decided to end our player-caddie relationship." the 47-year-old said. "Our decision is not based on a single incident. We just feel it's the right time for a change."

"My relationship and history with Bones far exceeds golf," he added. "He has been one of the most important and special people in my life since the day we met and I will always be grateful for everything he has done for me."

Mackay, 52, has been caddying professionally since 1990 and began working for Mickelson in 1992.

Lefty has been solid but unspectacular in 2017, making the cut in all 14 stroke-play events but earning just three top-10 finishes and zero wins.