During his rookie campaign, Jaskin scored 13 goals and five assists (18 points) in 54 games this season. He also recorded a plus-7 rating and 16 penalty minutes.
Of his 13 goals, four were game-winners.
Jaskin was drafted by the Blues in the second round (41st overall) at the 2011 NHL Draft.
Since July 1, the Blues have acquired forward Troy Brouwer in a trade with the Washington Capitals and signed Jori Lehtera (three years), Robert Bortuzzo (two years), Jake Allen (two years) and Kyle Brodziak (one year).