During the season, Morrison soon became key in attack by providing assists, having made a double assist in two separate league matches. In December 2009, Morrison signed a new two-year contract, that will keep him until 2012. In the Scottish Cup, Morrison began by scoring two goals in two games with a victory. Ross County would eventually progress to the final, beating Celtic along the way. After the match, Morrison said Celtic didn't play seriously. However, Ross County lost 3–0 in the final against Dundee United, where Morrison played in the left-back position. Just 15 days before the final, Morrison scored from a free kick in a 4–1 loss against Raith Rovers in the final game of the season.