Lee Mack Ritenour (/ˈrɪtnaʊər/ RIT-now-ər; born January 11, 1952) is an American jazz guitarist who has been active since the late 1960s.

In 1979, he "was brought in to beef up" one of Pink Floyd's The Wall's heaviest rock numbers, "Run Like Hell".

[3][11] Portrait (GRP, 1987) included guest performances by the Yellowjackets, Djavan, and Kenny G.[12] In 1988, his Brazilian influence came to the forefront on Festival, an album featuring his work on nylon-string guitar.

[4] He changed direction with his straight-ahead jazz album Stolen Moments which he recorded with saxophonist Ernie Watts, pianist Alan Broadbent, bassist John Patitucci, and drummer Harvey Mason.

Celebrating his fifty years as a guitarist in 2010, Ritenour released 6 String Theory, a title that refers to six musical areas covered by the use of guitar.

[3] Fourplay L.A. Workshop GRP All-Star Big Band With Alessi Brothers With Patti Austin With Carole Bayer Sager With George Benson With The Brothers Johnson With Natalie Cole With Brass Fever With Four Tops With Aretha Franklin With Art Garfunkel With Margie Joseph With Bill LaBounty With Melissa Manchester With Alphonse Mouzon With Leo Sayer With Carly Simon With Frank Sinatra With Barbra Streisand With Lenny Williams With others