| MAY | |
| DATE | TRANSACTION |
| May 3, 2013 | Called up G Drew MacIntyre from Toronto (AHL). |
| APRIL | |
| DATE | TRANSACTION |
| April 3, 2013 | Reassigned F David Broll and D Stuart Percy to Toronto (AHL). |
| MARCH | |
| DATE | TRANSACTION |
| March 26, 2013 | Called up D Jesse Blacker from Toronto (AHL). |
| March 23, 2013 | Assigned G Mark Owuya from Toronto (AHL) to Reading (AHL). |
| March 21, 2013 | Assigned D Mike Komisarek to Toronto (AHL). Called up F Ryan Hamilton from Toronto. |
| March 5, 2013 | Signed D Korbinian Holzer to a two-year contract extension through 2014-15 season. |
| March 4, 2013 | Traded F Mike Brown to Edmonton Oilers for a conditional 2014 fourth-round draft pick. |
| FEBRUARY | |
| DATE | TRANSACTION |
| February 21, 2013 | Assigned F Brad Ross to Idaho (ECHL). |
| February 1, 2013 | Claimed F Frazer McLaren off waivers from San Jose. Called up LW Ryan Hamilton from Toronto (AHL). Placed RW Mike Brown on injured reserve. |
| JANUARY | |
| DATE | TRANSACTION |
| January 30, 2013 | Assigned D Jake Gardner to Toronto (AHL). |
| January 26, 2013 | Assigned D Jake Gardner to Toronto (AHL). |
| January 20, 2013 | Signed LW Joffrey Lupul to a five-year contract extension through the 2017-18 season. |
| January 18, 2013 | Assigned F Matt Frattin and F Tim Connolly to Toronto (AHL). Returned D Mogan Rielly to Moose Jaw (WHL). |
| January 14, 2013 | Reassigned F Tyler Brenner from Bakersfield (ECHL) to Toronto (AHL). |
| January 9, 2013 | Fired general manager Brian Burke. |