Crushing news from Gary Player ... the golf legend has announced his wife of 64 years has died from cancer.
The three-time Masters champ announced the horrible news on his social media page Wednesday ... saying, "The unthinkable has happened."
"My childhood sweetheart, my rock, and my soulmate Vivienne has lost her battle with pancreatic cancer," Player said.
"I cannot describe the deep sense of sadness I feel at having lost the one person who has always meant the world to me."
Player explained he met Vivienne when he was 14 years old .