Peter Cortner replaced Dave Smalley as the vocalist for Dag Nasty in July of 1986. He stayed with the band until their breakup in July of 1988. Peter was also in Pitbull, Protem, Los Vampiros, and Lunchbox (with Joe Lally from Fugazi). Peter is married and living outside Philadelphia, Pennsylvania, where he is an elementary school teacher. While strictly as a personal hobby now, Peter has continued to make music under the names GPFA and, more recently, in a collaboration with Philadelphia area musicians entitled The Gerunds.