Bobby Osborne on NPR “Morning Edition” At 86, Bobby Osborne Doesn’t Intend To Quit Singing Anytime Soon Bobby Osborne is trying to find his way back to the lakeside home where he first heard “Rocky Top,” the song that would define his career as one half of the Osborne Brothers, one of bluegrass’ most popular and innovative groups. It’s a first class CD. I don’t think there’s anyone any better or who has done more than he has for the music.”, “We’ve heard this music our entire lives,” adds Ronnie McCoury. “Bobby was the first bluegrass mandolin player that I heard that when he would play a fiddle tune he didn’t just play it the way Bill Monroe had played it on the mandolin,” Bush said.