Since emerging from the Midwestern college circuit in the late '90s, O.A.R. (an acronym for the band's full moniker, Of a Revolution) have transformed themselves from campus jam rock favorites to Billboard chart-toppers with a streamlined alt-rock sound and a massive grassroots audience built through years of hard touring. Staffed by four Maryland natives and one Ohioan, O.A.R. rode their first college radio hit, the reggae- and roots-influenced "That Was a Crazy Game of Poker," to national headlining status with their independently released 2001 album, Risen, making a strong ...