This is a summary. To read the whole story subscribe to BostonGlobe.com
Los Lobos, Los Lonely Boys, and Alejandro Escovedo christened the main stage of the Outside the Box festival, heating up the Boston Common on a Saturday afternoon with a spirited package of Mex-American roots rock.
Though the three bands are currently touring together, the interplay among them fed into the festival spirit of generating artistic sparks that occur in unique musical settings and partnerships.
Outside the Box’s uniqueness stems from its sheer size — a week of free music, dance, and theater performances on multiple stages in the Common and at City Hall Plaza.