After hitting No. 1 with his second release Heavier Things, John Mayer used Try! to transition from sensitive singer-songwriter into bluesy guitar slinger. His succeeding albums have bridged those two halves with soulful adult contemporary fare or, more recently, ventured almost entirely into country and folk territory. On his current tour, he's been virtually ignoring his 2009 chart-topper, Battle Studies, and his first two major-label LPs, with set lists more likely to contain a Dylan or Petty cover than one of his earlier hits.