Jason Isbell and the 400 Unit Bassist Jimbo Hart Exits Band

The co-founding member took a break from performing with the band earlier this year to "resolve some old-school traumas"

Photo: Danny Clinch

BY Megan LaPierrePublished Nov 27, 2023

Jimbo Hart — co-founding bassist in Jason Isbell and the 400 Unit — has confirmed his departure from the band. 

"I am no longer a member of the 400 Unit," the musician wrote on the social media platform formerly known as Twitter today. "I am grateful for all the years, all the faces I've played for in the course of the band's history and proud of all we accomplished. I'm happy to be moving forward into a new chapter of life and open to all possibilities, as they may arise."
Back in June, Hart had announced a leave of absence from Isbell's righthand band, citing the need to tend to his mental health and "resolve some old-school traumas." Shortly thereafter, he reportedly went to rehab [via American Songwriter] — and while he wasn't there for addiction, the musician stopped smoking weed during treatment.

While touring in support of latest album Weathervanes, Hart has been replaced in the live lineup by multiple bassists, including Anna Butterss and Cat Popper, but there's no word yet on a permanent replacement.

Hart has played on every 400 Unit album, being involved in most of Isbell's career after the singer-songwriter's stint in Drive-By Truckers. The two musicians have been friends since 2006.

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