Revealing that he was actually a late call-up for the job, Mackey said it was tough to hold back on the celebrations when NPEC teased their first victory in four years at Ruatoria's Whakarua Park.
But with no one willing to take over, Mackey was forced to wait it out.
"The guy that would usually commentate was last seen at a party early Saturday morning so I was only a late call-up and then had to fill in," he told the Herald.
"We were winning at halftime so I was actually keen to start celebrating ... I had to then wait until the end of the game, I can't really drink and commentate."
NPEC eventually lost their promising lead to lose the game 19-26, but footage of the hilarious call has since been viewed more than 8,000 times after SKY Sport Rugby Commentator, Scotty Stevenson, posted the video on Instagram with the caption: "The greatest commentary of all time. Ever. In any sport. Ever".
In response to humorous comments, Mackey reposted the video to his account claiming that he wanted to inspire other broadcasters.
"Just out here trying to inspire the next generation of broadcasters ok??? Hahaha. For real though it's been 4 years since our last win and we were up at half time and I started over heating..." he wrote.