Conrad Yeatis "Sonny" Clark (July 21, 1931 – January 13, 1963) was an American

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 jazz

Jazz

Jazz is a musical style that originated at the beginning of the 20th century in African American communities in the Southern United States. It was born out of a mix of African and European music traditions. From its early development until the present, jazz has incorporated music from 19th and 20th...

 pianist

Pianist

A pianist is a musician who plays the piano. A professional pianist can perform solo pieces, play with an ensemble or orchestra, or accompany one or more singers, solo instrumentalists, or other performers.-Choice of genres:...

 who mainly worked in the hard bop

Hard bop

Hard bop is a style of jazz that is an extension of bebop music. Journalists and record companies began using the term in the mid-1950s to describe a new current within jazz which incorporated influences from rhythm and blues, gospel music, and blues, especially in the saxophone and piano...

 idiom.
Clark was born and raised in Herminie, Pennsylvania

Herminie, Pennsylvania

Herminie is a census-designated place in Sewickley Township, Westmoreland County, Pennsylvania, United States. The population was 856 at the 2000 census.-History:...

, a coal mining

Coal mining

The goal of coal mining is to obtain coal from the ground. Coal is valued for its energy content, and since the 1880s has been widely used to generate electricity. Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production. In the United States,...

 town southeast of Pittsburgh

Pittsburgh, Pennsylvania

Pittsburgh is the second-largest city in the US Commonwealth of Pennsylvania and the county seat of Allegheny County. Regionally, it anchors the largest urban area of Appalachia and the Ohio River Valley, and nationally, it is the 22nd-largest urban area in the United States...

. At age 12, he moved to Pittsburgh. When visiting an aunt in California

California

California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

 at age 20, Clark decided to stay and began working with saxophonist Wardell Gray

Wardell Gray

Wardell Gray was an American jazz tenor saxophonist who straddled the swing and bebop periods.Today often overlooked, Gray's playing displays a unique style, an unmatched tone and a strong presence.-Early years:...

. Clark went to San Francisco

San Francisco, California

San Francisco , officially the City and County of San Francisco, is the financial, cultural, and transportation center of the San Francisco Bay Area, a region of 7.15 million people which includes San Jose and Oakland...

 with Oscar Pettiford

Oscar Pettiford

Oscar Pettiford was an American jazz double bassist, cellist and composer known particularly for his pioneering work in bebop.-Biography:...

 and after a couple months, was working with clarinetist Buddy DeFranco

Buddy DeFranco

Boniface Ferdinand Leonard "Buddy" DeFranco is an American jazz clarinet player.-Biography:DeFranco began his professional career just as swing music and big bands — many of which were led by clarinetists like Artie Shaw, Benny Goodman and Woody Herman — were fading in popularity...

 in 1953.