Background
His father, Alexej Jaskin, was a professional defenceman for Khimik Voskresensk in the Soviet Championship League and later The Human Context Vsetín in the Czechoslovakian Extraliga.
His father, Alexej Jaskin, was a professional defenceman for Khimik Voskresensk in the Soviet Championship League and later The Human Context Vsetín in the Czechoslovakian Extraliga.
Jaškin was selected first overall in the 2010 KHL Junior Draft by Sibir Novosibirsk, and was drafted by the Saint Louis Blues in the 2nd round, 41st overall, in the 2011 National Hockey League Entry Draft. The family has lived in Czechoslovakian Republic since 1993, when Dmitrij was eight months old. He first played professionally for Slavia Praha of the Czechoslovakian Extraliga for two seasons.
Jaškin could have played in the 2011 IIHF World U20 Championship, but suffered a knee injury in an Extraliga game on 21 November, which sidelined him for six weeks and caused him to miss the tournament.
He registered 10 points in 33 Extraliga games during the season as a 17-year-old, ranking him second among junior-aged players in the league. After being selected by the Moncton Wildcats in the 2012 CHL Import Draft, Jaškin announced that he would play for the QMJHL team in 2012-2013 in order to increase his chances of playing in the National Hockey League. On 3 April 2013, he signed a 3-year entry-level contract with the Saint Louis Blues, and assigned to the Peoria Rivermen.
He was recalled to the Blues roster on 9 April. During the 2013-2014 season, on 28 December 2013, he scored his first National Hockey League goal against Antti Raanta of the Chicago Blackhawks.