Mark Paul "Corky" Siegel (born October 24, 1943) is an American musician, singer-songwriter, and composer.

[1][2][3] Corky Siegel's professional music career began in 1964, when he met guitarist Jim Schwall.

They landed a regular gig at Pepper's Show Lounge, where well known, established blues musicians such as Muddy Waters, Howlin' Wolf, Buddy Guy, Junior Wells, Magic Slim, and Willie Dixon would often sit in.

[8] Until "Siegel-Schwall lovingly disbanded" in March 2016, they still played occasional live dates and featured drummer Sam Lay and bassist Rollo Radford; Lay played with Siegel in the Happy Year Band of 1973 which also featured Chicago blues guitarist Albert Joseph.

In 1975, Siegel and Ozawa, with the San Francisco Symphony, first performed another William Russo work, "Street Music: A Blues Concerto".

The band consists of a string quartet – two violins, a viola, and a cello – along with percussionist Frank Donaldson, and Siegel on harmonica and also sometimes doubling on piano.