It was Game 5 of the World Series, and all of the fans at Citi Field were serenading his name.
Harvey was on the top of the world.
A dominant ace, a big money contract soon to follow and, oh yeah, a super-cool nickname as well: the Dark Knight.
Harvey's attitude and swagger on the mound combined with his incredible stuff put him in a prime position to be one not just one of New York's biggest stars, but one of the biggest stars in all of Major League Baseball.
All of that changed after the 2015 season.
Injuries, a shaky attitude, and poor performance led to the sudden demise of Harvey.
His pitching prowess went from the Dark Knight to the Pitcher Formerly Known as the Dark Knight.
Was there some bad luck along the way leading to his downfall? Absolutely.
Harvey had Tommy John surgery in 2013, but was able to recover. However, once Harvey was diagnosed with Thoracic Outlet Syndrome, his stuff never quite looked the same.
But injuries were not the only reason for Harvey's downturn as a Met.
In many ways he carried a "me first" attitude that didn't seem to be as much of an issue when he was dominating ballgames, but became far more problematic when he was not.
He missed a workout before the start of the 2015 postseason, but that was no big deal when you're dominant Matt Harvey.
However, it was a problem a few years later when he was MIA for a Sunday afternoon game due to a late night of partying the night before.
The antics will be tolerated when you're one of the best pitchers in baseball, but when you no longer fit that description, it makes you far more expendable.
The sad tale of Matt Harvey led to the unthinkable in 2018. The Dark Knight was DFA-ed, or the dreaded “designated for assignment.”
Last season, Harvey pitched to an ERA over 7 for the Angels, and very much looked like a guy whose baseball days were over.
As of right now, Harvey has campaigned for a chance to showcase himself in the Korean Baseball League, and WFAN's Boomer Esiason reported that the former Met would love to try to find the magic once again in a New York uniform.
The odds of Harvey rediscovering his mojo in the big leagues are not in his favor.
That said, Matt Harvey still fascinates me and a whole lot of New York baseball fans who wonder what could've been? I'm sure some of you wonder if the magic can ever be recovered.
I'd equate the odds of that happening to the Jets winning the AFC. In other words, not a bet I would make.