"We're you surprised when I emailed you?" asked KHOU 11 Sports Anchor Jason Bristol. "Yeah, I was surprised."
Mack's lived around Houston his whole life and back in the day, he was best-known for coming up with Oilers songs, like "Luv Ya Blue," before composing his Astros tune in 1979. Like Nolan (Ryan), (Joe) Niekro and (Bob) Knepper, Mack believes it remained in the Astros rotation through the 1980s.
Now, 'Go Go Astros' lives on YouTube and Mack's website, mackhayes.com.
Does it take him a long time to write a song like 'Go Go Astros?'
"It doesn't really take that long because you can kind of map out word associations," said Mack, who sings everything from motown to country. "(For example) 'This goes with Astros, this goes with Oilers.'"
Mack says he hasn't performed 'Go Go Astros' in a few years, but he agreed to play it for us at the restuarant before the dinner crowd arrived. Hayes continues to make weekly appearances at Sundance Grill II.
The response from small group gathered at the bar?
It proves 'Go Go Astros' is still a huge hit.
"People remember (the song)," he said. "It's amazing to me." Mack receives emails about the song through his website.
Would it be easy to write a song about this year's Astros team?
"Oh yeah, they're just so hot," said Mack. "That's kind of way the Oilers thing came about in the beginning; the Oilers were just so hot at that time."