He was once the raging, wild-haired, enfant terrible of men's tennis who blew like a hurricane into the All England Club, sending shivers down Wimbledon's genteel spine.
Now he sports well-tailored, conservative suits, deals in modern art and is an articulate, widely-respected father of six. And he still plays.
It's hard to believe that former superbrat John McEnroe has just turned 50.
The American reached the landmark birthday on Monday, just a day after playing fellow old-timer Pete Sampras in an exhibition event in Boston.
"At 50, he still plays great," said Sampras of McEnroe, who won the first of what would be 77 singles titles at the 1979 US Open.
McEnroe broke records and shattered conventions during his stormy career which officially ended in 1992.
Four US Opens, three Wimbledon titles and five Davis Cup titles came his way as did a remarkable 1984 season where he was pipped for the French Open title in what was just one of three defeats in a year of 82 wins.
"I don't feel troubled by being 50, but I'm feeling fine," said McEnroe who celebrated his birthday on Monday.