George Mraz (born Jiří Mráz on 9 September 1944 in Písek, Protectorate of Bohemia and Moravia, now Czech Republic) is a jazz bassist and alto saxophonist. He was a member of Oscar Peterson's group, and has worked with Pepper Adams, Stan Getz, Michel Petrucciani, Stephane Grappelli, Tommy Flanagan, Jimmy Raney, Chet Baker, Joe Henderson, John Abercrombie, John Scofield, Richie Beirach and many other important jazz musicians.
He also appears with Joe Lovano, Hank Jones and Paul Motian on Lovano's records, I'm All For You and Joyous Encounter.
Mraz is also known for performing solos with a bow in arco style like Paul Chambers.
During the 1970s he was a member of the New York Jazz Quartet and The Thad Jones/Mel Lewis Orchestra, and in the 1980s a member of Quest.
1977: Alone Together with Masaru Imada (Three Blind Mice1992: Catching Up1995: Jazz with Richie Beirach, Billy Hart, Larry Willis, Rich Perry1995: My Foolish Heart with Richie Beirach, Billy Hart1997: Bottom Lines with Cyrus Chestnut, Al Foster, Rich Perry1999: Duke's Place with Renee Rosnes, Billy Drummond, Cyrus Chestnut2002: Morava with Billy Hart, Emil Viklicky, Zuzana Lapčíková2007: Moravian Gems with Iva Bittova, Emil Viklicky, Laco Tropp2012: George Mraz quartet-Jazz na Hrade with David Hazeltine, Rich Perry, Joey Baron2014: Together Again with Emil ViklickýWith the New York Jazz Quartet
Surge (Enja, 1977)Song of the Black Knight (Sonet 1977)Blues for Sarka (Enja, 1978)New York Jazz Quartet in Chicago (Bee Hive, 1981)Oasis (Enja, 1981)With Pepper Adams
Ephemera (Spotlite, 1973)Julian (Enja, 1975)Twelfth & Pingree (Enja, 1975)Reflectory (Muse, 1978)The Master... (Muse, 1980)Urban Dreams (Palo Alto, 1981)With John Abercrombie
Arcade (ECM, 1978)Abercrombie Quartet (ECM, 1979)Straight Flight (JAM, 1979)M (ECM, 1980)Solar (1985)With Toshiko Akiyoshi
Time Stream (1984)Four Seasons (1990)Remembering Bud: Cleopatra's Dream (1990)Time Stream: Toshiko Plays Toshiko (1996)Hope (2006)50th Anniversary Concert in Japan (2006)With Eric Alexander
Solid! (Milestone, 1998)With Chet BakerStudio Trieste (CTI, 1982) with Jim Hall and Hubert LawsWith Kenny Barron
Minor Blues (Venus, 2009)With Richie Beirach
Elm (ECM, 1979)With Bob Brookmeyer
Back Again (Sonet, 1978)With Kenny Burrell
Ellington Is Forever Volume Two (Fantasy, 1975)With Benny Carter
In the Mood for Swing (MusicMasters, 1988)With Kenny Drew
Lite Flite (SteepleChase, 1977)With Yelena Eckemoff featuring Mark Turner, Joe Locke & Billy Hart
A Touch of Radiance (L&H, 2014)With Jon Faddis and Billy Harper
Jon & Billy (Trio, 1974)With Art Farmer
Crawl Space (CTI, 1977)With Tommy Flanagan
Eclypso (Enja, 1977)Ballads & Blues (Enja, 1978)Confirmation (Enja, 1977–78 [1982])The Magnificent Tommy Flanagan (Progressive, 1981)Giant Steps (Enja, 1982)Thelonica (Enja, 1982)Nights at the Vanguard (Uptown, 1986)Jazz Poet (1989)Beyond the Blue Bird (1990)With Stan Getz
Line for Lyons (Sonet, 1983) with Chet BakerThe Stockholm Concert (Sonet, 1983 [1989])Voyage (Blackhawk 1986)Bossas & Ballads – The Lost Sessions (Verve, 1989 [2003])With Dizzy Gillespie
The Winter in Lisbon (Milan, 1990)Bird Songs: The Final Recordings (Telarc, 1992)To Bird with Love (Telarc, 1992)With Urbie Green
The Fox (CTI, 1976)With Jaroslav Jakubovič
Coincidence (VMM, 2009)With Elvin Jones
Earth Jones (Palo Alto, 1982)Youngblood (Enja, 1992)With Keystone Trio
Heart Beats (1995)Newklear Music (1997)With Jimmy Knepper
Cunningbird (SteepleChase, 1976)I Dream Too Much (Soul Note, 1984)Dream Dancing (Criss Cross, 1986)With Steve Kuhn
Steve Kuhn Live in New York (Cobblestone, 1972)With Andy LaVerne and Al Foster
Time Well Spent (1994)With John Lewis
Evolution II (Atlantic, 2001)With Joe Lovano
Grand SlamCelebrating Sinatra (Blue Note, 1996)I'm All For You (Blue Note, 2003)Joyous Encounter (Blue Note, 2004)Classic! Live at Newport (Blue Note, 2016)With Warne Marsh
Star Highs (Criss Cross Jazz, 1982)Posthumous (Interplay, 1985 [1987])With Charles Mingus
Three or Four Shades of Blues (Atlantic, 1977)With Tete MontoliuBody & Soul (Enja, 1971 [1983])I Wanna Talk About You (SteepleChase, 1980)The Man from Barcelona (Timeless, 1990)With Mike Nock
In Out and Around featuring Mike Brecker and Al Foster) (1979)With Oscar Peterson
Another Day (MPS, 1970)In Tune (MPS, 1971)Walking the Line (MPS, 1971)With Art Pepper
Thursday Night at the Village Vanguard (Contemporary, 1977 [1979])Friday Night at the Village Vanguard (Contemporary, 1977 [1979])Saturday Night at the Village Vanguard (Contemporary, 1977 [1979])More for Les at the Village Vanguard (Contemporary, 1977 [1985])With Michel Petrucciani & Stephane Grappelli
Flamingo (Dreyfus, 1996)With Quest
Quest (Trio/Palo Alto, 1981)With Jimmy Raney
Wisteria (Criss Cross, 1985) with Tommy FlanaganBut Beautiful (Criss Cross, 1991)With John Scofield
John Scofield Live (Enja, 1977)With Zoot Sims
If I'm Lucky (Pablo, 1977) with Jimmy RowlesWarm Tenor (Pablo, 1979)Zoot Sims and the Gershwin Brothers (Pablo, 1975)With The Thad Jones/Mel Lewis Orchestra
Suite for Pops (A&M, 1972)Thad Jones/Mel Lewis and Manuel De Sica (Pausa, 1974)Potpourri (Philadelphia International, 1974)Live in Tokyo (Denon, 1974)New Life (A&M, 1976)With McCoy Tyner
McCoy Tyner Plays John Coltrane: Live at the Village Vanguard (Impulse!, 1997)With Mal Waldron
Mal 81 (Progressive, 1981) 
