[1] Komarov was a member of the gold medal-winning Finnish national teams in the 2011 IIHF World Championship and 2022 Winter Olympics.

Komarov captained Finland at the 2007 World Junior Ice Hockey Championships in Leksand and Mora, Sweden.

Komarov won a gold medal with Finland at the 2011 IIHF World Championships in Bratislava and Košice, Slovakia.

[5] Komarov played well following the signing, recording 4 goals and 16 assists in his first 23 games of the season, as well as 99 hits, enough for third in the NHL as of late November.

[6] However, a blindside hit from former Dynamo Moscow linemate Alexander Ovechkin on 29 November left Komarov with concussion issues, and he would score at a lackluster pace for the rest of the season.

[8] Komarov's production declined in the latter half of the season, partially due to the loss of van Riemsdyk in January to injury.

In 2017, Komarov played in the NHL Centennial Classic where he scored one goal in Toronto's 5–4 overtime win against the Detroit Red Wings.

[11] On 15 November 2021, Komarov signed a two-year contract with SKA Saint Petersburg of the Kontinental Hockey League (KHL).