Career
He is currently playing with the Toronto Maple Leafs of the National Hockey League (National Hockey League). Valiev was selected in the 3rd round (68th overall) of the 2014 National Hockey League Entry Draft by the Maple Leafs. Valiev was selected in the 1st round (3rd overall) of the 2012 KHL Junior Draft by Ak Bars Kazan.
After parts of two seasons with junior affiliate, Bars Kazan, he relocated to North America and played the 2012-2013 season with the Indiana Ice of the United States Hockey League.
After his draft selection to the Maple Leafs, Valiev was promptly signed to a three-year entry-level contract on July 10, 2014. Following his second season within the Kootenay Ice organization of the Western Hockey League, Valiev made his professional debut at the conclusion of the 2014-2015 season, playing in 2 games with the Maple Leafs AHL affiliate, the Toronto Marlies.
During the 2015-2016 season, behind the back of enjoying a solid season in his return to the Marlies, Valiev received his first National Hockey League recall on March 11, 2016. He made his National Hockey League debut with the Maple Leafs in a 4-0 defeat to the Ottawa Senators on March 12, 2016.