No — reliable public sources do not currently confirm Claude Lemieux's writing handedness.

Claude Lemieux is a retired Canadian professional ice hockey right winger. Known for his clutch play in the playoffs and his reputation as a "pest," Lemieux had a highly successful career spanning 20 seasons in the National Hockey League (NHL).

He is one of only 11 players in NHL history to win the Stanley Cup with four different teams. His Stanley Cup victories came with the Montreal Canadiens (1986), New Jersey Devils (1995, 2000), Colorado Avalanche (1996), and Detroit Red Wings (1999).

Lemieux was drafted by the Montreal Canadiens in the second round of the 1983 NHL Entry Draft. He quickly established himself as a fierce competitor, celebrated for his timely goals and controversial on-ice antics.

Throughout his career, Lemieux played for the Canadiens, Devils, Avalanche, Red Wings, Phoenix Coyotes, and Dallas Stars. After his playing career, he ventured into business, including a brief comeback to the NHL with the San Jose Sharks in 2009.