If there is any singer who reminds me a bit of Mark Farner of Grand Funk Railroad it is this artist.
Richardson also has a vibrato ridden set of pipes, the music Blues Rock with the other tracks on the album fused with psychedelic, jazz & funk.
He went on to start the band The Tubes in 75′. I definitely like the 69′ vibe a lot better from this Arizona band.
Wind and Rain
Written by Warren S. Richardson Jr.
Released off the 1969 artist self entitled album.
Credits on track.
Warren S. Richardson Jr. aka Bill Spooner – vocals, guitar
David Birkett – bass
Richard Lewis – keyboards
Mickey McGee – drums
On album
Otis Eugene Hale – sax
Joseph Ray Trainer – sax
Longshot's Blog 
Holy crow- he sounds just like Farner. Grand Funk was the first “big” concert I ever went to – December 23 1971 – Madison Square Garden – it was the Phoenix tour. Never heard this post before – interesting.