The 28-year-old has acquired the services of one of golf's most famous caddies
For the first time since his rookie season on the PGA Tour, Justin Thomas is set to have a new caddie on his bag.
“It came out of left field very recently. I have just tremendous respect for [Thomas] as a person and a player,” Mackay told Golf Channel. “It was an incredible phone call to get and I said yes.”
It brings to an end Thomas’ working relationship with long-time looper and recent inductee into the Caddie Hall of Fame, Jimmy Johnson.
It read: "Jimmy and I had an incredible run of 6 years together but we have agreed to go our separate ways. I 100% did not fire him, as Jimmy came to me after the Ryder Cup and told me he has decided to pursue other opportunities.
"I have nothing but respect for Jimmy and his wife Jen and I'll always appreciate all the success and times we had together, I wish him all the best."
As for Johnson's replacement, the prospect of working with JT proved too appealing to turn down.
“I love to caddie and I loved my role with NBC/Golf Channel, but it’s Justin Thomas," Mackay added.
Mackay and Thomas are familiar with each other, having worked together previously when Johnson was injured at the 2018 Sony Open and then again for a number of events in 2020, including the WGC-FedEx St Jude Invitational which Thomas won by three shots to become the World No. 1.
As mentioned, Mackay made a name for himself caddying for Mickelson, clinching five majors and countless worldwide victories in their 25-year stint, before stepping away from the job to become an on-course reporter for American TV.
Thomas isn't in PGA Tour action at this week's Sanderson Farms Championship after helping Team USA romp to victory at the Ryder Cup.
