Springsteen’s use of a mariachi sounds on “The Lost Charro” is inadvertently well-timed to the current commercial boom for Mexican regional music artists like Peso Pluma. The lovely song, from the lost Inyo album, includes a full mariachi band and bears little resemblance to anything else in the Springsteen catalog.

"The seven albums presented here have for one reason or another never seen the light of day," The Boss wrote of the expansive set.