For his sophomore LP with keyboardist Chris Connolly as Desertshore, ex-Red House Painters/Sun Kil Moon guitarist Phil Carney recruited his former frontman to sing lead vocals and play bass for several cuts on the 10-track effort. While the result of their latest collaboration, Drawing of Threes, won’t arrive in full until November 22, today you can hear a preview of Mark Kozelek stepping out of the shadows of last year’s more subdued SKM record on “Mercy,” an understated yet lively acoustic gem from the LP streaming above.