The Sheldon Keefe era officially begins Thursday night in Arizona and while everyone in 'Leafs Land' is anxious to see a new face behind the bench, they're also excited to see what changes will come to the lineup.

Practice is obviously the time for those lineup changes to be implemented and in his first practice with Toronto, Keefe's lines, specifically the power play units, were all the talk on Twitter.

Tyson Barrie, the player the Leafs acquired from the Avalanche this summer in a trade, is on the top unit and fans are looking forward to seeing what he can do in a role he's more than familiar with.
Barrie is more than capable of putting up big numbers offensively, but he only has 7 assists so far this season.  As for the other lines, not many changes were made, but it will be interesting to see what happens when Mitch Marner returns.
(H/T: Mark Masters)