Shortly after he worked on a bunch albums with bands that rocked the 60's & early 70's. He played keys on records for Sly Stone, The Rolling Stones, Quincy Jones, The Beatles and pretty everyone in the spectrum of the music scene at the time. He also wrote the now standard "You Are So Beautiful" which his homie Joe Cocker ended up singing.
He eventually got to doing his solo thing which scored him a string of No.1 singles, he even won a few coveted Grammy Awards for "Outta Space" and "Space Race" to name a couple.
He lived right up to 2006 actively touring & making records.
This one is "Sock it Rock It"
http://www.mediafire.com/file/nzdomwmm5f3/Sock it Rock it.mp3
Here he is rocking the Hammond B3