There have been over 235,500 games played across 154 years in Major League Baseball. In those, there have only been 24 perfect games thrown by a pitcher.
A perfect game is when a pitcher completes the maximum nine innings with no batter from the opposing team reaching base - with 27 men up to bat and all 27 being out without getting on base.
In 2004, Randy Johnson became the 17th pitcher to achieve a perfect game - in a 2-0 win over the Atlanta Braves for the Arizona Diamondbacks.
The 6'10 Hall of Fame pitcher was one of the greatest of his era - winning the Cy Young award five times and a World Series in 2001 with the Diamondbacks.
But despite his greatness as a pitcher, being one of the best to ever do it, the sport was never his biggest passion - which saw him retire to pick up his first love once again.
Johnson had been in love with photography since studying it at USC from 1983-85, when he got into the prestigious college on a baseball scholarship.
And 13 years after retiring, Johnson remains a photographer - being seen at a number of major events.
While going on several African safaris, Johnson's images have been used in Rolling Stone, Spin and Metal Hammer - while also being seen at NFL games when covering Arizona Cardinals games.
Speaking to Baseball Hall in a recent interview, he said: "A lot of people think because now I’m retired, they’re getting wind of the photography now.
"They think I just started, but in high school, I was into photography and then I studied photojournalism at USC and worked for the college newspaper there, The Daily Trojan and really got immersed into taking photographs, developing film and seeing the process.
"I’m not a professional. What I think is good is good for me but someone else may critique it differently," he adds.
"That’s how you get better. I don’t mind constructive criticism. I’m not a great photographer and I never said I was. I’m just trying to make people happy.
“I was a late bloomer in baseball. Hopefully, that will be the same thing with my photography."
Earlier this week, New York Yankees pitcher Domingo German became the 24th man to pitch a perfect game - the first to do so in 11 years.
