2006-07: Joe Morrow was chosen in the second round, 28th overall, of the 2007 WHL Bantam Draft by the Portland Winterhawks.
2007-08: Morrow made his first WHL appearance with the Winterhawks, going pointless in 1 game.
2008-09: In his WHL rookie season, Morrow played in 41 games for the Winterhawks. He picked up 7 assists in those games.
2009-10: In 65 games for the Winterhawks, Morrow scored 7 goals and added 24 assists for 31 points to go along with 59 penalty minutes. In 13 playoff games, Morrow notched 2 assists.
2010-11: In 60 games for the Winterhawks, Morrow scored 9 goals and added 40 assists for 49 points. In 20 playoff games, Morrow scored 6 goals and added 13 assists for 19 points. Morrow played for Team Cherry at the 2011 CHL Home Hardware Top Prospects Game. Morrow was chosen in the first round, 23rd overall, of the 2011 NHL Draft by the Pittsburgh Penguins.
2011-12: Morrow was so impressive in his first training camp with the Pittsburgh Penguins that he almost made the NHL roster out of training camp. However, concerned over a possible lack of ice time, the Penguins re-assigned the defensemen to the Portland Winterhawks of the WHL. Morrow picked up right where he left off with a powerhouse Portland team, posting 17 goals, 47 assists, and 99 penalty minutes in 62 regular season games. He had another impressive playoff performance as well, managing four goals and 13 assists in 22 games.
2012-13: Morrow spent his first pro season in the AHL. He began the year with Penguins affiliate Wilkes-Barre Scranton, appearing in 57 games, and then finished the year with Texas after being acquired by Dallas in exchange for Brenden Morrow in a March trade. In 66 AHL games between the two teams he scored 5 goals with 14 assists and was -4 with 39 penalty minutes. In eight playoff games with Texas he scored 2 goals with 1 assist and was -1 with 8 penalty minutes. Joe Morrow was obtained by Boston in July of 2013 as part of the multi-player trade involving Tyler Seguin and Loui Eriksson.
2013-14: Morrow skated in 56 of 76 games for Bruins AHL affiliate Providence in his first season in the Boston organization — missing time late in the year with a nagging knee injury. He scored 6 goals with 23 assists and was -1 with 28 penalty minutes in his second pro season. Providence finished third in the Atlantic Division and reached the second round in the playoffs. Morrow scored 2 goals with 5 assists and was +7 with 8 penalty minutes in 10 playoff games.
2014-15: Morrow made his NHL debut in October 2014 and did not look out of place during a 15-game stint with the club before being returned to AHL affiliate Providence in December. He scored 1 goal and was +3 with 4 penalty minutes, averaging 16:41 minutes of ice time while with Boston. Morrow was hampered by injury after returning to Providence, suffering an upper-body injury and then another knee injury that limited him to 33 regular season games. He scored 3 goals with 9 assists and was +4 with 14 penalty minutes. Providence finished second in the Atlantic Division and lost to Hartford in a first-round playoff series. Morrow was -1 with no points and 6 penalty minutes in five playoff games.
Morrow is a mobile and aggressive two-way defenseman who can play in all situations. He plays with poise and maturity and possesses the ability to retrieve the puck from his own zone and start the play up ice. His puck-distribution ability is top notch and he has a hard and heavy shot that typically hits the net. Morrow owns a high hockey IQ and does an excellent job of keeping his head up when moving the puck up ice and carrying it along the blue line. Knee injuries have hampered his progress but when healthy he has been a steady, reliable two-way defenseman who controls the pace of play.
Morrow has spent the 2015-16 season with Boston — struggling to crack the lineup for a deep Bruins' defense corps. A former first-round pick who is now with his third organization, Morrow is in the final year of his original entry-level contract and will be a restricted free agent this summer. His play this season suggests he can play in a lower line role in the NHL. With the emergence of Colin Miller and top prospects like Jakub Zboril and Brandon Carlo coming up through the system, however, Morrow could be caught in a numbers game in the Boston organization.