In 1982, he appeared in two games, but at the end of the season he was traded to the Baltimore Colts as part of the deal that brought John Elway to Denver. In 1983–84 Herrmann saw limited action with the Colts, first at Baltimore and then at Indianapolis.
In 1982, he made appearances in two games, but towards the end of the season, he was exchanged to the Baltimore Colts as part of the agreement that brought John Elway to Denver. In 1983–84 Herrmann had restricted involvement with the Colts, initially at Baltimore and then at Indianapolis.