[2] He was also selected 11th overall in the Kontinental Hockey League (KHL) draft by Torpedo Nizhny Novgorod, but he ultimately chose London after deciding he did not want to play in Russia.

[3] Namestnikov scored 68 points in 68 games with the Knights in 2010–11 and was rated one of the top players available in the 2011 NHL Entry Draft, eventually being selected in the first round by the Tampa Bay Lightning.

[4] On 14 September 2012, the Lightning assigned Namestnikov and 17 other players to the Syracuse Crunch, their American Hockey League (AHL) affiliate, during the 2012–13 NHL lockout.

[5] He finished the season playing in the Calder Cup Final, where the Crunch fell to the Grand Rapids Griffins in a 4–2 series defeat.

[9] He regained his scoring touch in Syracuse and on 6 January 2015, he represented the Eastern Conference in the AHL All-Star Game.

[13] On 15 January 2016, Namestnikov recorded his first career NHL hat-trick in a 5–4 overtime win over the visiting Pittsburgh Penguins.

[16] On 26 February 2018, the day of the 2017–18 NHL trade deadline, the Lightning sent Namestnikov to the New York Rangers, along with Brett Howden, Libor Hájek and a 2018 and 2019 draft pick, in exchange for Ryan McDonagh and J. T.

[18] Namestnikov began the 2019–20 season with two scoreless games for the Rangers before he was traded to the Ottawa Senators in exchange for Nick Ebert and a fourth-round pick in the 2021 NHL Entry Draft on 7 October 2019.

[20] In his second game, Namestnikov collected his first two goals plus an assist against his former club, the Tampa Bay Lightning, helping the Senators claim their first victory of the season in a 4–2 decision on 12 October 2019.

[24] On 13 July 2022, Namestnikov signed as a free agent to a one-year, $2.5 million contract to return to his original draft club, the Tampa Bay Lightning.