John Klingberg knows his name is in the mix for the Norris Trophy and he takes pride in that observers are noting how improved his all-around game has become since breaking into the NHL during the 2014-15 season. It’s easy to see the offensive side of the 25-year-old Gothenburg, Sweden native. He’s hit double digits in goals in each of his first four NHL seasons and has six through 50 games this season with the Dallas Stars. Since his rookie season, Klingberg is third in the league among defenseman with 195 points and is fifth averaging 0.92 points per game. What did Klingberg do differently over the summer to warrant such high praise? Not much, really. He trained in a similar fashion with his brother, Carl, who plays in Switzerland, Victor Svedberg of the AHL’s Rockford IceHogs and Christian Folin of the Los Angeles Kings. It’s been more of a mental thing, he says. “I just feel the whole team and myself have been really mentally prepared [since] summer to come into the season and really change things with how we want to be prepared as a team and how we want to play hockey,” Klingberg said during NHL All-Star Media Day. “From last year, it’s a lot of redemption with the disappointing season that we had and just coming in mentally prepared for this season.” That mental prep has helped the Stars to the current wild spot they reside through 50 games. During the few days away from meaningful hockey games, Klingberg spent some time picking the brain of fellow Central Division All-Star Alex Pietrangelo, a fellow defenseman whose name has also been bandied about in the midseason Norris discussion. The Stars blue liner said he wanted to find out how Ken Hitchcock helped his game while coaching the Blues.