[8] NHL scouts praised his speed, playmaking ability and vision on the ice but believed he needed to show more consistency and physicality.[11] Attending his first NHL training camp that month, he did not make the Blue Jackets roster and was returned to Portland on October 2 for another year of junior hockey.[14] Prior to the start of the 2011–12 season, Johansen participated in the Blue Jackets training camp[15] and their annual NHL Prospects Tournament.[19] Three days later, Johansen and fellow rookie John Moore both scored their first career NHL goals against the Detroit Red Wings to lead the team to their first win of the season.[21] After playing in his ninth game of the season, having recorded two goals and two assists in that span, Johansen was notified by Blue Jackets head coach Scott Arniel that he would remain with the team and not be returned to junior.[24] Due to the NHL's decision to lock out the players at the start of the 2012–13 season until a new collective bargaining agreement could be reached, Johansen was reassigned to the Blue Jackets' American Hockey League (AHL) affiliate, the Springfield Falcons.[35] Shortly after the Blue Jackets were eliminated from playoff contention, he was re-assigned to the Falcons on April 28 to help them with their 2013 Calder Cup Championship run.[38] Although the Blue Jackets struggled to win games at the start of the 2013–14 season, Johansen began to develop chemistry with new linemates Brandon Dubinsky and Cam Atkinson on the top line.[44] On April 8, Johansen scored the game-winning goal at 3:33 of overtime to lead the Blue Jackets to their 41st win of the season and tie a franchise record.[45] After scoring another game-winning goal a few days later, he helped the Blue Jackets clinch the first wild-card spot to face the Pittsburgh Penguins in the first round of the 2014 Stanley Cup playoffs.[50] Despite the holdout, Johansen made an immediate impact on the Blue Jackets lineup by quickly tallying six goals and 14 assists for 20 points through 17 games.[56] Although the Predators then suffered a losing streak from March 26 to April 2, the team qualified for the 2016 Stanley Cup playoffs when the Colorado Avalanche lost to the Washington Capitals.[59] However, during Game 6, head coach Peter Laviolette moved Filip Forsberg up on the top line with Johansen and James Neal.[75] As the Predators faced off against the Chicago Blackhawks in the 2017 Stanley Cup playoffs, Johansen continued his dominant performance by tallying at least one point in all four games of the first round sweep.[76] In their second round matchup against the St. Louis Blues, Johansen scored the series-winning goal in Game 6 to help the Predators advance to the Western Conference Finals.Johansen immediately underwent emergency surgery for an acute compartment syndrome in his left thigh and was ruled out for the remainder of the playoffs.[82] As the Predators struggled to produce goals through October, head coach Peter Laviolette moved Scott Hartnell to the top line with Johansen and Arvidsson in early November to generate more offensive opportunities.[87] Once the two wingers returned, the line continued to dominate on the ice and helped the Predators maintain a 15-game point streak through late February and early March.[88][89] On April 5, Johansen and the Predators won their first Central Division title in franchise history to clinch a spot in the 2018 Stanley Cup playoffs.[97] However, despite their early success, the line began to fragment as Johansen went on a seven-game goalless streak while Arvidsson suffered a lower body injury.[98] While Arvidsson recovered, head coach Peter Laviolette alternated between Colton Sissons, Kevin Fiala, and Craig Smith on the Predators' top line with Johansen and Forsberg.[111] Although Johansen remained with his usual linemates, they failed to reproduce their previous playoff production and finished the postseason with a combined four points through six games."[117] While the league paused play, Johansen and teammates Josi, Matt Duchene, and Pekka Rinne established a fund at two Dunkin' Donuts locations in Nashville to serve hospital workers.[124][125] On April 6, 2022, Johansen recorded his first career NHL hat-trick to help the Predators maintain their lead for the Western Conference's first Wild Card spot.[127] In February 2023, during a game against the Vancouver Canucks, Johansen was inadvertently cut by the skate of Quinn Hughes and underwent surgery on his lower right leg.[146] Johansen played his first years of minor hockey with the Vancouver Thunderbirds organization until his family moved to the suburb of Port Moody.