After graduating, Lindberg played senior hockey for a couple of seasons and was selected for the US national team at the 1970 Ice Hockey World Championships. Team USA had been relegated the year before and needed to win its bracket have a chance at a gold medal. Lindberg scored 6 points in 7 games as the US swept through their schedule, finishing undefeated and were promoted. Lindberg finished out the season playing for the Fort Wayne Komets but found himself chosen for the national team again the following year. Against much stiffer competition, Lindberg could only record a single assist anf the US was relegated to pool B again.