Zac Brown Band headlined Morrison, CO’s Red Rocks Amphitheatre for the first time Sunday night. Robert Randolph & the Family Band and The Wood Brothers opened the night. Later, Randolph emerged during ZBB’s performance for Bill Withers’ “Use Me.” ZBB is currently in support of its new studio album You Get What You Give. The group will perform at Reno, NV’s Lawlor Events Center tomorrow.