Wikipedia : This day (September 23, 1935), in Lexington, Kentucky, is born Les McCann, an American soul jazz piano player and vocalist .
Les McCann : In 1960, McCann was signed to the L.A.-based Pacific Jazz label owned by producer Nick Venet, who recognized Les signature soul groove style that mothered an entire movement of back-to-the-roots jazz. McCann became the label’s top-selling artist, debuting with Plays the Truth (1960).
@ allmusic : McCann switched to Limelight during 1965-1967 and then signed with Atlantic in 1968. After the success of Swiss Movement, McCann emphasized his singing at the expense of his playing and he began to utilize electric keyboards, notably on 1972’s Layers.
@last.fm : His last release, On the Soul Side (MusicMasters 1994), featured his Magic Band and once again reunited him with Eddie Harris and Lou Rawls. As if a lifetime of musical success is not enough, Les’ creations go beyond the keys.