O'Byrne has a goal and three assists in 34 games this season for Colorado, which currently owns the worst mark in the NHL.
The 28-year-old O'Byrne joins a Maple Leafs squad that's in the thick of the Eastern Conference playoff chase. He could help add more defensive stability to a team that's surrendering an average of 2.67 goals a game.
Colorado originally acquired O'Byrne from Montreal on Nov. 11, 2010. He was taken by the Canadiens in the third round of the 2003 draft.
This is a big year for us in a lot of ways. You can see Garth and management really trying to find that solution to get us into the playoffs and consistently have that. The pressure is great. You have to enjoy it. It just means there's a great opportunity ahead of you.