Since the spring, Dave Matthews Band has toured with an additional horn player, trumpeter Rashawn Ross. On Saturday, the group doubled its wind power once again, adding two additional brass musicians to its lineup: P-Funk trumpeter Bennie Cowen and saxophonist Greg Thomas. After opening the groups performance at Chicagos Tinley Park with the George Clinton, the duo returned for a hefty portion of DMBs set, including So Much to Say, Too Much, Jimi Thing, You Might Die Trying and Ants Marching. Dave Matthews Band will close out its summer tour next weekend at Charlottesville, VAs John Paul Jones Arena.