Berglund, 30, was originally drafted by the Blues (No. 25 overall) in the 2006 NHL Draft. In 10 seasons with the Blues, the 6-foot-4, 219-pound forward collected 322 points (168 goals, 154 assists) and 242 penalty minutes in 694 regular season games. Berglund is a native of Vasteras, Sweden.
Sobotka, 30, originally joined the Blues via trade from the Boston Bruins on June 26, 2010. Across nine NHL seasons, including six with the Blues, the 5-foot-10, 184-pound forward has tallied 155 points (47 goals, 108 assists) in 463 regular season games. Sobotka is a native of Trebic, Czech Republic.
Thompson, 20, was originally drafted by the Blues (No. 26 overall) in the 2016 NHL Draft. Last season, his first in the NHL, the 6-foot-5, 205-pound forward recorded nine points (three goals, six assists) in 41 regular season games. The Phoenix, Arizona native also posted 18 points (eight goals, 10 assists) in 30 regular season games with the American Hockey League's (AHL) San Antonio Rampage.