Five-time PGA Tour champions winner Steven Alker announced Thursday that his caddy, Sam Workman, has been diagnosed with terminal cancer.

Alker, the reigning Charles Schwab Cup winner, made the heartbreaking announcement in a post on Instagram.

Steven Alker of New Zealand and his caddy, Sam Workman, hold the Charles Schwab Cup on the 18th green after the final round of the PGA TOUR Champions Charles Schwab Cup Championship at Phoenix Country Club on November 13, 2022, in Phoenix, Arizona.
(Ben Jared/PGA TOUR via Getty Images)

«It is with a heavy heart that I share the devastating news that [Workman] has been diagnosed with terminal cancer. Our hearts break for Sam and his family as they process this information, but at this uncertain time, we want them to know they are not alone.»

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Alker has been associated with Workman since 2019. Since working together, Alker has won five starts on the PGA Tour Championship, most recently receiving the Charles Schwab Cup in 2022.

Steven Alker of New Zealand celebrates on the 18th hole with his caddy, Sam Workman, after winning the Insperity Invitational at The Woodlands Golf Club on May 1, 2022, in The Woodlands, Texas.

Steven Alker of New Zealand celebrates on the 18th hole with his caddy, Sam Workman, after winning the Insperity Invitational at The Woodlands Golf Club on May 1, 2022, in The Woodlands, Texas.
(Riley/Getty Images)

«Sam Workman has been so much more than a professional golf caddy to me over the past four years,» Alker’s post read.

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«He’s been a friend, a motivator, a decision maker and a fighter. We’ve had some tough times and lately some really good ones. He’s been like a big brother to me since we first connected in 2019.»

Steven Alker of New Zealand hugs caddy Sam Workman after winning the Charles Schwab Cup following the final round of the Charles Schwab Cup Championship at Phoenix Country Club on November 13, 2022 in Phoenix, Arizona.

Steven Alker of New Zealand hugs caddy Sam Workman after winning the Charles Schwab Cup following the final round of the Charles Schwab Cup Championship at Phoenix Country Club on November 13, 2022 in Phoenix, Arizona.
(Christian Petersen/Getty Images)

«Please join me and my family in sending prayers to Sam and the Workman family in their time of need,» the post continued. «He is surrounded by well wishes and lots of love from ‘Team Alker’ and could use even more, from old friends, new friends, Tour friends and family. Thank you all.»
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Workman, a 55-year-old Texan native, played golf most of his life and has caddied in nearly 400 tournaments, according to the Golf Channel. Alker and Workman met through a mutual friend.