Formerly the guitarist and third-banana songwriter for roots-rock titans Drive-By Truckers, now-solo alt-country singer Jason Isbell steps further into his own territory with February’s eponymous album — Trucker head Patterson Hood served as producer on Isbell’s first record after the amicable split two years back, but no longer. This inspired split bill — also, notably, opening night for the revamped Jefferson Theater — pairs him with wonderful home-grown country-rock bros Sons Of Bill, who deserve an audience at least as large as his.

Hybrid bluegrass songwriter Peyton Tochterman opens.

Peyton Tochterman - Mamma’s Genes