Oleksiak had 17 points (five goals, 12 assists) in 68 games with the Penguins and Dallas Stars last season, including 14 points (four goals, 10 assists) in 47 games after he was acquired from the Stars in a trade Dec. 19 for a fourth-round pick in the 2019 NHL Draft.
He credited Penguins assistant coaches Sergei Gonchar and Jacques Martin for helping him improve.
"I can't say enough about those guys and how much they've helped me out, and how willing they are to put in the extra time after practice or away from the rink to really help me develop my game," Oleksiak told the Penguins website Friday. "I think having those guys was huge for me last year.
"To get another three years to work with them and fine-tune some things is a great opportunity that I couldn't pass up on."
Dallas selected Oleksiak in the first round (No. 14) of the 2011 NHL Draft. He has 36 points (11 goals, 25 assists) 187 NHL games with the Penguins and Stars. He scored one goal for Pittsburgh in 12 Stanley Cup Playoff games.
