Berglund wasted little time establishing himself as a productive NHL player. He was named to the NHL All-Rookie Team in 2008-09 after he had 21 goals, becoming the 10th rookie in St. Louis Blues history to score 20. Among those goals was the 10,000th in franchise history, Nov. 1, 2008, against the Pittsburgh Penguins.

Selected by the Blues with the No. 25 pick in the 2006 NHL Draft, Berglund was fourth among NHL rookies with 47 points and second in power-play points (22). He led the Blues with a plus-19 rating, second among rookies, and played in the YoungStars game that season.

He made his NHL debut Oct. 10, 2008, against the Nashville Predators, getting an assist for his first NHL point. Berglund scored his first NHL goal Oct. 13, 2008, against the Toronto Maple Leafs, and made his Stanley Cup Playoff debut April 15, 2009, against the Vancouver Canucks.

On Oct. 3, 2009, Berglund scored the winning goal in a 5-3 victory against the Detroit Red Wings in his native Sweden. He shared the team lead with four game-winners in 2009-10. In 2010-11 he scored eight of his 22 goals on the power play, leading the Blues in that category. Berglund scored his first two Stanley Cup Playoff goals April 12, 2012, against the San Jose Sharks.

Berglund led the NHL in shooting percentage (23.0) in 2012-13. He also was second on the Blues in goals (17) and power-play goals (five), tied for the team lead with three game-winning goals and led St. Louis with two shorthanded goals. Berglund had a four-game goal streak and two five-game point streaks during the season.

Berglund tied for third on the Blues with four playoff points in 2014-15, and five of his 10 goals the next season were game-winners, ranking him second on St. Louis.

Outside of the NHL, Berglund has won medals with Sweden at several international tournaments. Before heading to the NHL, he had 54 points (22 goals) in 46 games for Vasteras in the Sweden's second-highest league in 2007-08.

On March 15, 2015, against the Dallas Stars, Berglund became the first European to play 500 games for St. Louis.

NOTES & TRANSACTIONS

• NHL All-Rookie Team (2009)
• Signed as a free agent by Vasteras (Sweden-2), September 18, 2012.
• Traded to Buffalo by St. Louis with Vladimir Sobotka, Tage Thompson, St. Louis' 1st-round pick in 2019 or 2020 NHL Draft and St. Louis' 2nd-round pick in 2021 NHL Draft for Ryan O'Reilly, July 1, 2018.