 Known as "The Handsome Swede" by Blues supporters, Petterson made an impact as an excellent first-line forward alongside Bernie Federko and Brian Sutter, setting the team record for points as a rookie with 73.Pettersson played five seasons with the Blues before being traded to the Hartford Whalers.During the 1985–86 NHL season he was traded to the Washington Capitals in exchange for Doug Jarvis.