In the 2012–13 season, Morrissey led Prince Albert defenceman in points, scoring 15 goals and 32 assists to go with a +14 plus-minus rating and 91 penalty minutes.

[3] On October 3, 2013, the Winnipeg Jets signed him to three-year, two-way contract,[4] although he returned to Prince Albert for the season.

The Raiders were fourth in the East Division before being swept by the eventual 2014 Memorial Cup champions, the Edmonton Oil Kings, in the first round.

[5] He would help lead the Rockets to the WHL championship as well as to the final of the 2015 Memorial Cup, which they lost to the Oshawa Generals.

[11] Later, on October 1, 2019, just prior to the start of the 2019–20 NHL season Morrissey was named an alternate captain of the Jets.