Cink pulled out of the Wells Fargo Championship this weekend and will remain away from the game for an undetermined length of time as Lisa undergoes treatment. He announced the news — and his intention to stay by Lisa's side — via Twitter.
See Cink throughout his career:
Stewart Kink throughout his career
Golfer Stewart Cink quits PGA Tour to support wife Lisa after breast cancer diagnosis
Jan 16, 2016; Honolulu, HI, USA; PGA golfer Stewart Cink tees off on the 11th hole during the third round of the Sony Open in Hawaii golf tournament at Waialae Country Club. Mandatory Credit: Brian Spurlock-USA TODAY Sports
Stewart Cink of the U.S. looks at his birdie putt on the first hole during the first round of the WGC Bridgestone Invitational PGA golf tournament at Firestone Country Club in Akron, Ohio, August 4, 2011. REUTERS/Matt Sullivan (UNITED STATES - Tags: SPORT GOLF)
Stewart Cink of the U.S. hits out of a bunker onto the 15th green during the first round of the British Open golf Championship at Muirfield in Scotland July 18, 2013. REUTERS/Brian Snyder (BRITAIN - Tags: SPORT GOLF)
Defending champion Stewart Cink of the U.S. hits his tee shot on the second hole during second round play at the British Open golf championship on the Old Course in St. Andrews, Scotland, July 16, 2010. REUTERS/Shaun Best (BRITAIN - Tags: SPORT GOLF)
Stewart Cink of the U.S. hits off the 14th tee during the second round of the U.S. Open Golf Championship in Pebble Beach, California, June 18, 2010. REUTERS/Hans Deryk (UNITED STATES - Tags: SPORT GOLF)
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Cink has won six PGA Tour events in his career. He tied for third place at the 2008 Masters and memorably won the Open Championship in 2009. He's also a five-time member of the American team at the Ryder Cup.
Here's his full statement about stepping away from the sport.