Metheny/Mehldau Quartet is a jazz album released in 2007 by Nonesuch Records, and is a collaboration album between guitarist/composer Pat Metheny, and jazz pianist Brad Mehldau. The first disc, Metheny/Mehldau, was released in 2006, and contains mostly duet recordings with the exception of two tracks. On this album, however, Mehldau's two trio men, drummer Jeff Ballard and bassist Larry Grenadier are much more present, given the title of the album.
Metheny/Mehldau Quartet chronicles the second recording session between Pat Metheny and Brad Mehldau's Trio. The album was recorded at the same time as Metheny/Mehldau, in December 2005.
- Pat Metheny – guitar, 42-string guitar (on Track 2), acoustic guitar (on Track 4), guitar synth (on Tracks 5 & 9)
- Brad Mehldau – piano
- Larry Grenadier – bass
- Jeff Ballard – drums
Track 2, 4, 6, and 11 are Metheny/Mehldau duets
- PatMetheny.com Pat Metheny official website
- BradMehldau.com Brad Mehldau official website
-  Review of Metheny Mehldau Quartet