Drafted from the
Swedish Elite League's
AIK, Kjellberg made his North American professional debut during the
1992–93 season with Montreal's
AHL affiliate, the
Fredericton Canadiens. He also made his
NHL debut
that same season with Montreal, appearing in seven games. After the season, however, Kjellberg returned to Sweden and played five more seasons in Elitserien. With HV71, he won the Swedish National Championship during the season of 1994–1995. Kjellberg returned to the NHL in the
1998–99 season to play with the
Nashville Predators. He was traded during the
2001–02 season to the
Mighty Ducks of Anaheim in exchange for
Petr Tenkrat. In his NHL career, Kjellberg appeared in 394 games. He scored 64 goals and added 96 assists. He also appeared in ten
Stanley Cup playoff games with Anaheim during the
2003 playoffs, going scoreless. After his playing career, Kjellberg has worked for
Leksands IF as sports manager. ==Career statistics==