Yes you are correct on the connection Austin. I saw Poco about 30 years ago. They were the opening act for the band Marshall Tucker. They blew that band out of the water. Timmie's singing was superb to say the least. The song that his voice comes through so beautifully on is Keep On Tryin. Listen to it you'll see what I mean. Happy Listening. Hey if you are interested I can give you a lot of other bands you could check out from the 70's. I was and maybe still am a music aficionado.
I think I have a great ear for good music. My opinion...