Legendary golfer Arnold Palmer died at the age of 87 of heart complications in Pennsylvania on Sunday, Reuters reported. Palmer's career was studded with 62 Professional Golfers Association of America victories with a fan following that is referred to as "Arnie's army".

His agent, Alastair Johnston said, "Today marks the passing of an era. Arnold Palmer's influence, profile and achievements spread far beyond the game of golf. He was an iconic American who treated people with respect and warmth, and built a unique legacy through his ability to engage with fans."

Known as "The King", Palmer was introduced to the game at the age of four by his father, a greenskeeper. His unique and unorthodox swing helped sports channels secure major television rating points. He ranked fifth on the PGA Tour's list of all-time tournament victories at the time of his death, Reuters reported.

Palmer was the first golfer to achieve $1 million in career earnings. He went on to join the Senior PGA Tour for players 50 and older in its debut season in 1980 and won 10 tournaments. He quit professional golf in 2006.

The American golfer was also considered a pioneer in sports marketing after he ventured into business with a golf course design firm and a golf resort in Orlando, Florida. He was awarded the Presidential Medal of Freedom, the highest civilian honour in United States of America, in 2004. Palmer was also a pilot, who flew until the age of 81, and even has a regional airport named after him. He founded several charities, including the Arnold Palmer Hospital for Children in Orlando.

Former world number one golfer Tiger Woods tweeted, "Thanks Arnold for your friendship, counsel and a lot of laughs."