2009-10: Gustav Olofsson returned to Sweden after playing youth hockey in California and skated for IF Bjorkloven and participated in the TV-Pucken tournament for high school age players in Sweden. He played for Vasterbotten in the tournament and had 1 assist with 4 penalty minutes in seven games.
2010-11: Olofsson moved back to the United States and played for the Colorado Thunderbirds U16 midget team. He scored 5 goals with 10 assists and had 18 penalty minutes in 35 games. Olofsson was selected by Green Bay in the second round (29th overall) of the 2011 USHL Entry Draft.
2011-12: Olofsson made his USHL debut, playing in three November games for Green Bay, and was the second leading scorer for the Colorado Thunderbirds U18 team. He had 1 assist and was +1 in his brief time with the Gamblers. Olofsson scored 5 goals with a team-high 25 assists and had 10 penalty minutes in 38 games for the Thunderbirds. In March he committed to playing hockey at Colorado College in either 2013-14 or 2014-15.
2012-13: Olofsson was named to the USHL’s All-Rookie team in his first season with Green Bay and played in the USHL/NHL Top Prospects Game. He played 63 games for the Gamblers and scored 2 goals with 21 assists and was +11 with 59 penalty minutes. The defending Clark Cup champions, Green Bay finished second in the East Division but were beaten by Youngstown in the playoff quarterfinals. Olofsson was scoreless and -2 in the four game series. He was ranked 51st amongst North American skaters in Central Scouting’s final rankings prior to the 2013 NHL Draft.
2013-14: Olofsson made his pro hockey debut in April — signing a three-year entry-level contract with Minnesota in March 2014 following his freshman season at Colorado College and joining Wild AHL affiliate Iowa. He scored 1 goal and was -1 with 2 penalty minutes in eight AHL games. Iowa missed the AHL playoffs; finishing fifth in the Midwest Division. Playing on the top defense pair for Colorado College with junior Peter Stoykewych (WPG), he scored 4 goals with 4 assists and was -12 with 20 penalty minutes. Colorado College finished seventh in the first season of the National Collegiate Hockey Conference and was swept by North Dakota in an NCHC quarterfinal series.
Olofsson is a lanky, mobile defender. He is capable of joining the rush and has a big shot but is viewed more as a stay-at-home type.
Olofsson skated with the Wild in the Traverse City prospect tournament and attended training camp with Minnesota before being assigned to AHL affiliate Iowa to start the 2014-15 season. Expected to be part of Minnesota's defense corps sooner rather than later, Olofsson skated in one game for Iowa before suffering a shoulder injury that required surgery. He has yet to return to the lineup but is expected to be back before the season ends. Long-term he will need to add strength and bulk to his frame but projects as a top-four defender at the NHL level.