Michael Goessling, a 58-year-old St. Louis business executive, always knew he was adopted through Catholic Charities as a baby — he just never imagined a rock legend was part of his story.

A routine 23andMe test connected him to Michael McDonald, the five-time Grammy winner behind the Doobie Brothers and "Yah Mo B There." McDonald, who had Goessling as a teenager, reportedly welcomed the match and the two have since connected directly.

"I just wanted to know where I came from," Goessling told reporters of the decades-long mystery, now solved just shy of his 59th birthday.