- Split the season between EV Zug and HC Lugano in National League A (NLA) in Switzerland.
- Recorded 17 points (five goals, 12 assists) in 30 games with Lugano.
- Ranked second among defensemen on Lugano in points, tied for second among team defensemen in goals and ranked third among team defensemen in assists.
- Registered three assists/points in six playoff games.
- Tied for third on the team — and led team defensemen — in assists during the playoffs.
- Tied for fifth on the team — and tied for first among team defensemen — in points during the playoffs.
- Split the season between Malmo in Allsvenskan, Malmo J20 in SuperElit, and IK Pantern in Division 1 in Sweden.
- Tallied two goals and 10 assists for 12 points, along with 10 penalty minutes in 43 games with Malmo.
- Tied for third among Malmo defensemen in assists and ranked fifth among defensemen on the team in points.
- Recorded four goals and one assist for five points in eight games with Malmo J20.
- Split the season between Farjestad J20 of the SuperElit, Farjestad of the SHL and Malmo of Allsvenskan.
- Skated in 22 games with Farjestad J20, registering 11 goals and 16 assists for 27 points, along with
14 penalty minutes and an even plus/minus rating.
- Led all defensemen in goals, assists and points.
- Skated in 34 games with Farjestad, registering one goal and one assist for two points, along with
six penalty minutes.
- Skated in nine games with Malmo, registering two assists, along with four penalty minutes, along with
a plus-4 plus/minus rating.
2011-12: Established Swedish Under-20 SuperElit career-highs in games played (49), goals (12), assists (24), points (36), and penalty minutes (56) for Farjestads Karlstad. ... Ranked second in the league among defensemen in points, third in goals and fourth in assists. ... Also tied for the league lead among defensemen in goals (two), and fourth in assists (three) and points (five) in six playoff contests.
2012: Captured a silver medal with Sweden at the IIHF Under-18 World Junior Championship, tallying three assists and 13 shots on goal in six tournament contests.
Displays above average vision. ... Has an accurate pass and great poise with the puck. ... Good understanding of the game. ... Is a skilled puckhandler with good two-way potential. ... NHL-ready size and hands.
Entered the 2012 NHL Entry Draft ranked 15th overall among European skaters in the final Central Scouting Rankings.
“Calle is alert in his own end, positions himself very well when defending and is a solid all-around skater. He knows how to play the game in all three zones and is a smart player.” — Amateur Scout, Jan Gajdosik
June 23, 2012 –- Selected by the Rangers in the fourth round, No. 119 overall, of the 2012 NHL Entry Draft