Best wishes to you too, Larry, and thanks for posting this tribute to Mike Kirkland.
Apparently, Mike left the Brothers Four in 1969 after his son (2 years of age) passed away from pneumonia.
Mike decided to spend more time with his family.

I loved the vid showing the guys singing "Greenfields" but to be honest, I would have preferred they would have also sung
"The Green Leaves of Summer" instead of "Try To Remember."

Just my opinion. What do I know? :>)