Gardiner hasn't played since sustaining a concussion during a game Dec. 8 while playing for the Leafs' American Hockey League team, the Toronto Marlies. In 22 AHL games, he had nine goals and eight assists.
The 6-foot-2, 184-pound blueliner had 30 points in 75 games as a rookie with the Maple Leafs last season.
He's, believe it or not, actually one of my favorite guys, and I've ended up trading him twice. I appreciate what he's done. He was one year away from being an unrestricted free agent, and I felt with this opportunity, that it was a chance that we were able to get somebody for him in Nick Bonino and Adam Clendening.
— Penguins GM Jim Rutherford on forward Brandon Sutter