Jankowski was a top scorer at the midget AAA level, where he played for the St. Catharines Minor Midget AAA Falcons of the Ontario Minor Hockey Association's South-Central Triple A Hockey League. However, he went unselected in the Ontario Hockey League midget draft as teams were concerned that at five feet, eight inches tall, he was too small to play the top level of junior hockey. He chose to play at Stanstead College, a prep school based in Stanstead, Quebec. He played two seasons for Stanstead, scoring 31 goals and 73 points in the 2010–11 high school team's season and 53 goals and 93 points in 57 games in 2011–12. During his second season at Stanstead, Jankowski committed to play college hockey for the Providence Friars. Boston University, Cornell, Harvard, Maine, and Penn State were also interested in his services, but he decided to follow Friars coach Nate Leaman, who had previously shown interest in Jankowski while coaching Union College, to Providence. During his two seasons in Stanstead, Jankowski quickly gained height, growing to six feet, two inches tall while his play caught the attention of scouts. He was eventually selected in the 2012 OHL draft, taken as the 11th pick in the 7th round by the Saginaw Spirit though he declined to join the team. The National Hockey League 's Central Scouting Bureau ranked Jankowski as the 43rd best prospect for the 2012 NHL Entry Draft in its final ranking, an improvement from his 74th place rank in previous reports. Other analysts ranked him higher, including Craig Button of The Sports Network, who placed him 41st. The Calgary Flames selected him in the first round, 21st overall. He is the highest-ever draft pick out of a Canadian high school. The Flames received some criticism for going "off the board" and selecting Jankowski well above his expected draft place, but assistant general managerJohn Weisbrod stated that while Jankowski's talent was "raw", other teams were certain to select him in the first round if the Flames did not. General managerJay Feaster argued that Jankowski was one of the most talented players available in the draft. At draft time his stats were 6 foot 2.5 inches, 168 pounds. Jankowski initially committed to play for the Dubuque Fighting Saints of the United States Hockey League in 2012–13 before for Providence. However, he decided to bypass the junior league and move directly to college following the Flames' 2012 rookie development camp, stating he believed he was ready despite the fact that he will be one of the youngest players in the National Collegiate Athletic Association.
Professional
Jankowski began his professional career on March 30, 2016, signing a two-year entry level contract with the Flames. The deal began during the 2016–17 NHL season; for the remainder of 2015–16, Jankowski played with the Flames' American Hockey League affiliate, the Stockton Heat. These games did not count towards his contract, which will expire following the completion of the 2017–18 NHL season. Jankowski was called up by the Flames in November 2016, making his NHL debut against the New York Islanders on November 28, 2016. On November 9, 2017, Jankowski scored his first career NHL goal against the Detroit Red Wings in a 6-3 win. On April 7, 2018, the last game of the Flames regular season, Jankowski recorded his first four goal game in a 7–1 win over the Vegas Golden Knights.
Personal life
Jankowski is a native of Dundas, Ontario. His grandfather, Lou, was a longtime professional player who appeared in 127 NHL games with the Detroit Red Wings and Chicago Blackhawks in the 1950s. His granduncle was Hockey Hall of FamerRed Kelly and his father, Len, played college hockey with the Cornell Big Red. His uncle, Ryan, is currently the Director of Amateur Scouting for the Buffalo Sabres, and was recently Hockey Canada's director of player personnel, a scout for the Montreal Canadiens and an assistant general manager with the New York Islanders. Jankowski's younger brother David signed an amateur tryout contract with the Calgary Flames.
