Golfers and caddies showed their support for Jarrod Lyle by wearing yellow ribbons when the WGC-Bridgestone Invitational got under way on Thursday.
It was announced this week that Lyle has decided to stop active treatment and begin palliative care following a brave battle with leukaemia.
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Emotional tributes have poured in from the golfing fraternity for the 36-year-old, who is focusing on spending his remaining time with his family.
The European Tour on Thursday tweeted a picture of yellow ribbons at the Firestone Country Club next to a sign saying: "Yellow ribbons for players and caddies provided to show support for PGA Tour family member Jarrod Lyle.
"Thank you for your support, thoughts and prayers for Jarrod and his family."
Russell Knox, Brendan Steele and Matt Fitzpatrick were among the early starters with a ribbon on their caps.