Former Leicester City and England striker Frank Worthington is suffering from Alzheimer's disease, according to his daughter.
Worthington's daughter, Kim Malou, wrote on Facebook that her father has been battling the disease for "several years" with "positive thinking and football".
Journeyman Worthington, 67, scored 260 goals in 828 appearances over a 25-year career between 1966 and 1991.
In that time, Worthington spent successful spells at Huddersfield Town and Leicester City, as well as winning eight caps and scoring twice for England in 1974.
Later in his career he played for Bolton Wanderers, Birmingham City, Leeds United, Sunderland, Southampton and Brighton & Hove Albion.
He was top scorer in the First Division in the 1978-79 season.
On Facebook, his daughter said people had been wondering about her father's health.
"He was diagnosed several years ago and has been holding it off with positive thinking and football", she said.
"They say several footballers from my dad's era seem to have suffered the same disease, possibly due to the constant heading of the heavy football back in the day.
As time goes by though, there are moments when you see the effects of Alzhiemer's and this is hard sometimes for all those involved with a loved one who has this disease.
"It's a funny thing that the one big lesson my dad always taught me was 'mind over matter'....
"No matter how hard life gets, being positive will pull you through. Every adversity is a opportunity for change and growth... Thanks dad, that is the biggest gift you ever gave me!"
The post has been shared thousands of time and flooded with messages of support.