Cobourne opened up his second season as the full-time starting back for Montreal with a 19 carry, 107 yard performance with a touchdown against Calgary. Then against Edmonton, Cobourne rushed for 65 yards and a touchdown on 10 carries. Then against the Saskatchewan Roughriders, Cobourne produced a career-high 146 rushing yards and two touchdowns on 25 carries. In the next four games, Cobourne totaled 216 yards rushing with three touchdowns and 146 receiving yards. In the next game against Saskatchewan, Cobourne rushed for 101 yards on 19 carries and 20 receiving yards and a touchdown. Against the BC Lions in the next game, he totaled 122 total yards of offense. In the final game of September against Hamilton, Cobourne rushed for a career-high 193 yards and two touchdowns with 46 yards receiving. He won the Most Valuable Player award in the 97th Grey Cup when the Montreal Alouettes defeated the Saskatchewan Roughriders 28–27 on November 29, 2009.