O'Reilly, 29, begins his third season with the Blues and his 12th season in the NHL. Already winning a Stanley Cup, Conn Smythe and Selke Trophy in his short tenure with St. Louis, O'Reilly will now don the "C" for the first time in his career. He has played in 804 career NHL games while 153 of those have been with the Blues. O'Reilly was traded to St. Louis by Buffalo on July 1, 2018 in exchange for Tage Thompson, Vladimir Sobotka, Patrik Berglund, a first-round draft pick in the 2019 NHL Draft and a second-round draft pick in the 2021 NHL Draft.
Tarasenko, 29, begins his ninth season in St. Louis after being selected in the first round of the 2010 NHL Draft. He has been an Assistant Captain for the past four seasons. Tarasenko has played in 507 NHL games, all with St. Louis, while recording 428 points (214 goals, 214 assists).
Schenn, 29, begins his fourth season in St. Louis after coming over in a trade with Philadelphia in exchange for Jori Lehtera, a first-round pick in the 2017 NHL Draft and a first-round pick in the 2018 NHL Draft. He has played in 658 career NHL games and recorded 430 points (179 goals, 251 assists).
Parayko, 27, begins his sixth season in St. Louis after being drafted by the Blues in the third round of the 2012 NHL Draft. He has played in 386 NHL games and has scored 10 goals in each of the last two seasons. Parayko was second on the team in points among defenseman last season.