General Manager Dale Tallon announced today that the Blackhawks have claimed left winger Karl Stewart off waivers from the Pittsburgh Penguins. Stewart, 23, stands at 5.11 and weighs in at 180 pounds. He appeared in 3 games for the Penguins this season and did not score. Stewart played his junior hockey at Plymouth in the Ontario Hockey League before signing as a free agent with the Atlanta Thrashers on September 28, 2001. He played in 13 games for the Thrashers over two seasons and had 1 assist with 19 penalty minutes. In his NHL career, Stewart has played in 16 NHL games with 1 assist and 21 penalty minutes.