According to TSN.ca, the Toronto Maple Leafs have acquired defenceman, John-Micheal Liles from the Colorado Avalanche. The Avalanche will receive Toronto's second round pick in 2012. That draft pick was acquired in the Thomas Kaberle and Boston deal last year.

Quote from TSN.ca:

The Avalanche sent the defenceman to the Maple Leafs in exchange for Toronto's second round draft pick in 2012.

That draft pick was acquired when the Leafs dealt Tomas Kaberle to the Bruins last year.