In 1999, Biello left the Impact because the new ownership decided not to play the 1999 outdoor season in order to better prepare the 1999-2000 indoor season, which left him to sign with rivals the Rochester Raging Rhinos. With Rochester, Biello enjoyed much success; he was Rochester's leading scorer with eight goals and four assists. He also helped the Rhinos win the U.S. Open Cup for the very first time and helped reach the championship game, which Rochester lost to the Minnesota Thunder.