The 22-year-old defenseman was traded to Pittsburgh on July 26 with the contingency that Edmonton would receive the draft pick if he signed with or was traded by the Penguins.
"Adding a young defenseman like John to our organization will be very helpful," Pittsburgh general manager Jim Rutherford said. "His development was accelerated last year and he became a top 10 defenseman in college hockey, giving himself a chance to play at the NHL level."
He had 42 points (seven goals, 35 assists) in 101 games over three seasons with Harvard, including 11 points (three goals, eight assists) in 33 games last season. He was selected by the Oilers in the sixth round (No. 154) of the 2015 NHL Draft.
