Question: Which American banjo player was featured in the album "Once in a Very Blue Moon"

Context paragraphs:
Blue Origin Blue Moon: The Blue Origin "Blue Moon" is a proposed lunar lander designed by Blue Origin for use for cargo deliveries to the Moon.  "Blue Moon" is an unmanned lunar spacecraft that is projected to provide an Amazon.com-like delivery service to the Moon.  Blue Moon derives from the vertical landing technology used in Blue Origin's New Shepard sub-orbital space tourist rocket.  The lander platform was first revealed in March 2017.

Raymond Fairchild: Raymond Fairchild (born March 15, 1939) is an American banjo player from the Great Smoky Mountains.  He is known for his fast playing, his fancy and intricate picking and his ability of making the banjo mimic both animals and humans.

Roger Sprung: Roger Sprung (born August 29, 1930, in New York City) is an American banjo player and teacher best known for introducing authentic bluegrass banjo picking styles to the folk music community in the north and for the eclectic manner in which he has adapted bluegrass banjo techniques to music of other genres.

Billy Faier: Billy Faier (December 21, 1930 – January 29, 2016) was an American banjo player.  He, along with Pete Seeger, was one of the early exponents of the banjo during the mid-20th-century American folk music revival.

Red Roundtree: Luther 'Red' Roundtree, (born August 4, 1905 in Mount Pleasant, Texas - died April 30, 1990) was an American plectrum banjo player and co-founder of The Banjo Kings in 1951, an American banjo band.

Lee Sexton: Lee Sexton (born 1928, in Letcher County, Kentucky) is an American banjo player from Letcher County, Kentucky.  He began playing the banjo at the age of eight and is proficient in the two-finger picking and "drop-thumb" (clawhammer) traditional styles of east Kentucky.  He also sings.  His "Whoa Mule" album includes recordings from a 1952 home recording with fiddler Fernando Lusk to recordings made in 2001.  Four solo songs also appear on Smithsonian Folkways album "Mountain Music of Kentucky."

Blue Moon (The Marcels album): Blue Moon is the debut studio album by the doo-wop group The Marcels.  It was released in 1961 on Colpix Records and included 12 songs.  The album was available in mono, catalogue number CP-416.  "Blue Moon" was produced and arranged by Stu Phillips and was recorded in New York at RCA Studios.  "Blue Moon" features a cover version of the Judy Garland hit "Over The Rainbow".  Four decades after the group's debut album was released, The Marcels were inducted into the Vocal Group Hall of Fame.

Lazy Farmer (album): Lazy Farmer is the 1975 album by British folk rock group Lazy Farmer.  This short-lived group consisted of pioneer British folk musician Wizz Jones, his wife Sandy Jones, John Bidwell and Jake Walton.  The album was dedicated to American banjo player John Burke, whose book "Fiddle Tunes for the Banjo" inspired the formation of Lazy Farmer.  The album was recorded at Conny Plank's countryside studio in Cologne, Germany.

Béla Fleck: Béla Anton Leoš Fleck (born July 10, 1958) is an American banjo player.  An innovative and technically proficient banjo player, he is best known for his work with the bands New Grass Revival and Béla Fleck and the Flecktones.

Once in a Very Blue Moon: Once in a Very Blue Moon is singer-songwriter Nanci Griffith's third album.  The sounds have become a little more country and a little less folk than her previous albums.  Her first two albums were backed sparsely with instrumentation, but starting with this album, the whole complement of country-styled instrumentalists can be heard.  Noted country musicians performing on the album include banjo player Béla Fleck and champion fiddle player Mark O'Connor.  The title song was covered by Dolly Parton, who included her version on her "Real Love" album in 1985.

Supporting paragraphs: Once in a Very Blue Moon Béla Fleck
Answer: Béla Fleck