In 2000–01, Hlinka returned to the NHL as head coach of the Pittsburgh Penguins. He and Alpo Suhonen became the second and third Europeans to ever coach in the NHL, following Johnny Gottselig. His first season also coincided with Mario Lemieux's return to the NHL, and together they made a surprising run to the Eastern Conference Finals, knocking off the higher seeded Washington Capitals and Buffalo Sabres along the way before falling to the New Jersey Devils. The next season was not successful, as the struggling small-market Penguins had traded their superstar, Jaromír Jágr. Hlinka himself was criticized by Lemieux for not taking classes in the summer to improve his English and that contributed to the frosty relationship between them. He was fired four games into the 2001–02 season and returned to Europe.