Daniel "Danny Kootch" Kortchmar (born April 6, 1946) is an American guitarist, session musician, producer and songwriter. Kortchmar's work with singer-songwriters such as Linda Ronstadt, James Taylor, David Crosby, Carole King, David Cassidy, Graham Nash, Neil Young, Steve Perry, and Carly Simon helped define the signature sound of the singer-songwriter era of the 1970s. Jackson Browne and Don Henley have recorded many songs written or co-written by Kortchmar, and Kortchmar was Henley's songwriting and producing partner in the 1980s.

Source: Wikipedia (https://en.wikipedia.org/wiki/Danny_Kortchmar)