With their electrifying, all-improvised sets, Whose Hat is This? are a group that embodies unhinged musical spontaneity. The collective of current and former Tedeschi Trucks Band members bassist Tim Lefebvre (David Bowie), saxophonist Kebbi Williams (Outkast), and drummers JJ Johnson (John Mayer) and Tyler "Falcon" Greenwell (Col. Bruce Hampton) seamlessly conjure up whirling music that combines elements of experimental jazz, funk, electronica, and just about everything in-between. The band’s debut self-titled record was released in 2017 and featured highlights from their first-ever performance, an impromptu gig at the A-Trane in Berlin. Their second album Everything’s OK released in the fall of 2018 continues in the same vein and was recorded during their explosive concert at The 8x10 in Baltimore with guest hip-hop artist Kokayi. The band’s records capture their sheer energy and potent musicianship that make each of their live performances like nothing you have ever experienced before.


Tim Lefebvre

Throughout his wide-ranging career, Tim Lefebvre has amassed a reputation for being one of the world’s most innovative bassists. The Foxboro-native’s creative playing style is an addictive blend of jazz improvisation, rock undertones, and electronic grooves that can be heard on his appearances on over 150 recordings, ranging from Grammy award-winning albums such as David Bowie’s Blackstar to the soundtracks of classic films such as The Departed. From 2013 to 2018, Lefebvre was the bassist of the dynamic blues rock ensemble Tedeschi Trucks Band, and he can be heard on their two most recent releases, Let Me Get By (2016) and Live From The Fox Oakland (2017). Before joining the group, he worked with artists such as Wayne Krantz, Chris Botti, and Leni Stern, and he continues to work with contemporary artists such as Chris Potter, Empire of the Sun, Knower, Chris Thile, and Matisyahu. Now based in Los Angeles, Lefebvre is currently the bassist for numerous groups, most notably with improvisational free-jazz group Whose Hat Is This? and with his Blackstar bandmate Donny McCaslin. Lefebvre is also the producer for a diverse range of projects, which includes singer-songwriter Rachel Eckroth’s album When It Falls (2018). Through all of these experiences over the past two decades, Lefebvre has constantly expanded his musical artistry, discovering new sounds for the bass guitar and influencing a generation of musicians along the way.

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Kebbi Williams

Grammy award winning tenor saxophonist Kebbi Williams is one of contemporary music’s whirlwind improvisers. The imaginative multi-instrumentalist/ composer/producer/arranger/teacher resists categorization. His innovative sound dives, blends and jumpstarts all music genres. Kebbi bends it to his will with his robust, distinct blasts. His playing and compositions create a sound that is uniquely and undeniably his own. Avant-garde jazz, hip-hop, Afro-beat, gospel, electronica, classical and fiery rock are all loops that Kebbi interweaves with passion and edge. 

The Atlanta native received both an undergraduate degree and Master's in Jazz Studies from prestigious Howard University. At the age of 22, he won the Jazz Instrumental Soloist Category (college division) award from Downbeat Magazine. Kebbi launched his professional career as a much in demand studio and touring musician. Outkast, the legendary Donald Byrd, Cee-lo Green, Mos Def, drummer Jeff “Tain” Watts, Bilal, Oteil Burbridge, Me’Shell Ndegeocello, Russell Gunn, Julie Dexter and iconic Betty Carter are among the elite musicians and vocalists who jumped off of Kebbi’s unique horn. He is also an original member and presently touring for the sixth year with the Tedeschi Trucks Band (with whom he won the Grammy in 2012 in the Blues Album category).

Kebbi Williams continues to do what he has always done: break down barriers and push the boundaries with both his music and vibrant social consciousness for his hometown and beyond.

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JJ Johnson

Growing up in Austin, TX, JJ was surrounded by a variety of music from the very beginning. He has worked with many notable artist and musicians including Charlie Sexton, Doyle Bramhall, Boz Scaggs and John Mayer -- who he teamed up with in 2003 for a 7 year stint. JJ does a variety of recording work as well in between these ventures. 

In 2010, The Tedeschi Trucks Band began assembling their all-star eleven-piece unit featuring Susan Tedeschi and Derek Trucks. Laying down the groove for this amazing group remains JJ's current focus today.

Tyler "Falcon" Greenwell

Tyler Greenwell is a professional drummer currently residing in Atlanta, GA. Since 2009 he has toured and recorded with the Tedeschi Trucks Band. Tyler has also performed and/or recorded with various other artists, including The Susan Tedeschi Band, Colonel Bruce Hampton, The Wood Brothers, Scrapomatic, Jimmy Herring, Geoff Acheson, and Shemekia Copeland. Before moving to Atlanta in 2006, Tyler lived in Pensacola, FL where he grew up and played in local and regional touring bands. 


Whose Hat Is This? Debut Record


On a night off during Tedeschi Trucks Band’s 2015 Europe tour, fellow bandmates Tim Lefebvre (bass), Kebbi Williams (sax), JJ Johnson (drums), and Tyler Greenwell (drums) convened at the intimate A-Trane in Berlin for a special one-off evening of improvised music. Whose Hat Is This? documents this historic night with selected tracks from the group’s electrifying set of free jazz and fearless exploration.


  • A

  1. Whose Hat is This

  2. NYKUS

  3. Eventually I Won't Look Stupid

  4. Safari History

  5. It Won't Help You


  • B

  1. Body Shaming

  2. Hobo Gigolo Style


  4. LettaBrue (or the worst pronunciation of Lefebvre ever)

  5. Jizzards

  6. Who the Hell Goes to Musicals

*Digital version also includes "Breaux Mart" and "Jackie_!_@#% Does She Know"

Purchase: Vinyl | Digital


Mixing: Steve Wall 

Mastering: Nate Wood 

Engineer: Ralf Brockman

Instigator: Sedal Sardan



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