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Defence pairings can be fluid over the course of the year, although minutes played is a good indicator of where players fit in on a roster.
Clearly, Dion Phaneuf is the Leafs' No. 1 blueliner. He plays the most minutes, faces the stiffest competition night after night and usually anchors the first power-play unit from the point. He's also due to make $7 million in 2014-15.
With Carl Gunnarsson no longer a Leaf, Phaneuf will be playing with a different regular partner. Depending on how Carlyle wants to use his top duo, it could be any one of Jake Gardiner, Morgan Rielly or possibly Stephane Robidas.
Cody Franson seems unlikely to play here as he and Phaneuf have played very little together in recent seasons. Roman Polak is likely to be used in a shutdown role, so he may in fact ease the burden on Phaneuf next season.
Gardiner played the second-most minutes on the team last year. He could be the odds-on choice to fill this role.
All stats can be found on NHL.com unless noted otherwise.