The Maple Leafs bolstered their defense Wednesday by acquiring Ryan O'Byrne from the Avalanche for a fourth-round draft pick in 2014, according to an ESPN.com report.

O'Byrne has a goal and three assists in 34 games this season for Colorado.

The Leafs also announced the signing of defenseman Andrew MacWilliam to a two-year entry level deal. MacWilliam, 23, was selected by Toronto in the seventh round of the 2008 draft.