2008-09: In his first season in the WHL, Adam Morrison served as the backup to Saskatoon Blades' starter Braden Holtby. In 13 games, Morrison posted a 9-1-1-0 record. He finished with a 2.49 goals-against average and a .907 save percentage.
2009-10: Earning tandem duties for the season, saw Morrison appear in 36 games with the Blades, posting a .895 Save Percentage and 3.29 GAA.
2010-11: Morrison appeared in 30 games as a backup to 20-year-old Steven Stanford for the WHL's Saskatoon Blades. He was 16-7-3 with 2 shutouts and had a 2.89 goals against and .901 save percentage. The Blades finished first in the East Division with the WHL's best record and reached the second round of the playoffs. Stanford handled all the goaltending in the playoffs for Saskatoon. Morrison re-entered the 2011 NHL Draft after not being signed by the Flyers but was not selected.
2011-12: Morrison was signed to a one-year entry-level contract by the Bruins in March 2012. He made his pro debut with AHL Providence at the end of the season after spending the year in the WHL with Saskatoon and Vancouver. Morrison stopped 35 shots in a 4-2 loss to Albany in his only AHL game. Morrison began the year with Saskatoon but was traded to Vancouver in October to clear up room for Russian prospect Andrey Makarov. He was 1-1 in two games with the Blades prior to the trade. Playing for Vancouver, Morrison tied for fourth in the WHL with 35 wins and had a 2.75 goals against and .901 save percentage. He was 35-16-3 and had 1 shutout in 55 games. Vancouver finished second in the B.C. Division. In the six game playoff series against Spokane he was 2-4, with one loss in overtime, and had a 3.64 goals against and .874 save percentage.