2010-11: Warg returned to his native season after two seasons in the WHL and skated for Orebro in AllSvenskan (Sweden's second league). In 50 games for third-place Orebro he scored 1 goal with 6 assists and was +10. Warg was the team leader in penalty minutes with 129 PMs. In 10 games in the six-team Kvalserien playoff tournament he had 1 assist with 37 PMs. Orebro failed to reach the Elitserien, finishing fifth.
2011-12: Warg played for Orebro in AllSvenskan in his second pro season in Sweden. In 51 games he scored 2 goals with 3 assists and was +5 with 42 penalty minutes. Orebro finished first in Allsvenskan but failed to earn a spot in the Elitserien for 2012-13: finishing 5th in the six-team Kval Series. Warg was an even plus/minus with no points and 14 penalty minutes in 10 Kval Series games.
2012-13: Warg went from Orebro to Vasteras in his third AllSvenskan season. A teammate of fellow Ducks prospect Tim Heed with Vasteras, Warg was the leading scorer amongst defensemen with 4 goals and 15 assists in 52 games and was +21 with 40 penalty minutes. Vasteras finished third in the regular season but came up short in the quest for an SHL slot in 2013-14; finishing fourth in the Kval Series. Warg scored 1 goal with 1 assist and was -6 with 2 penalty minutes in 10 Kval Series games. He signed a two-year entry-level contract with Anaheim in May, 2013.
Warg is a smart player who makes good passes and skates well. He will need to fill out and learn the North American style of play. With the right development, he has the size and skills required to become a solid NHL defenseman.