A lot has changed in the world over the past 25 years but one thing has remained remarkably consistent in that time – Phil Mickelson's Official World Golf Ranking.

Incredibly, the American has never been outside the top 50 players during the last quarter of a century.

During that time, Mickelson has become a three-time Masters champion and has also won The Open in 2013 as well as the US PGA Championship in 2005.

Mickelson, now 49, was presented with a special award for his astounding achievement at Royal Portrush on Tuesday, two days prior to the start of the 148th Open Championship.

"It's a special honour to be able to have this, I feel very fortunate to be able to play golf," said Mickelson, who surpassed 25 years in November. 

"To be recognised for this achievement, I'm very grateful.

"My passion for the game and my love for the game of golf always consumes my thoughts."