After Brad Delp's death in March 2007, his adult children organized a concert in his memory on August 19, 2007, at the Bank of America Pavilion in Boston and invited the group to perform. Fran Cosmo was unable to sing due to a vocal injury, so Scholz invited guest singers to appear in his place, including Michael Sweet from Stryper and long time Boston fan Tommy DeCarlo who, after auditioning for Scholz, made a guest appearance on lead vocals. DeCarlo would later become the lead singer for Boston. Early Boston members Barry Goudreau and Fran Sheehan also appeared, joining Scholz on stage for the first time in over 25 years.