2008-09: Lucas Lessio played for the Toronto Marlboro Midget AAA team in the GTHL. In 72 games, he scored 53 goals and added 60 assists for 113 points. Lessio was chosen in the first round, 7th overall, of the 2009 OHL Priority Selection by the Niagara Ice Dogs.
2009-10: Prior to the 09-10 season, Lessio's rights were dealt from the Ice Dogs to the Oshawa Generals. Lessio played junior A hockey for the St. Michael's Buzzers of the CCHL. In 41 games, he scored 30 goals and added 42 assists for 72 points to go along with 87 penalty minutes. In 5 playoff games, he registered 3 assists. Lessio played for Team Ontario at the 2010 World U-17 Hockey Challenge, scoring 2 goals and adding 3 assists for 5 points in 6 games.
2010-11: In his OHL rookie season, Lessio played in 66 games for the Generals. He scored 27 goals and added 27 assists for 54 points to go along with 66 penalty minutes. In 10 playoff games, Lessio scored 5 goals and added 4 assists for 9 points. Lessio played for Team Orr at the 2011 CHL Home Hardware Top Prospects Game.
2011-12: Lessio returned to Oshawa for his second OHL season after attending camp with the Coyotes and was the General's second-leading scorer behind Rangers' prospect Christian Thomas. Lessio scored 34 goals with 28 assists in 66 games and was minus-six with 71 penalty minutes. Nine of his 34 goals were scored on the Generals power play. Oshawa finished third in the East Division and lost to OHL playoff finalists Niagara in a first round series. Lessio scored 3 goals with 2 assists and was minus-one with 6 penalty minutes in the six game series with the Ice Dogs. He signed a three-year entry level contract with the Coyotes in September, 2012.
2012-13: Lessio made his pro hockey debut with the Coyotes' AHL affiliate in Portland following his third OHL season with Oshawa. In five AHL regular season games he scored 1 goal with 1 assist and had an even plus/minus with 4 penalty minutes. The Pirates finished second in the Atlantic Division and were swept by Eastern Conference champion Syracuse in the first round, losing two of the three games in overtime. Lessio skated in all three playoff games and was +1 with 2 assists. He scored 19 goals with 15 assists and was +11 with 38 penalty minutes in 35 OHL games — missing much of the season and an opportunity to represent Canada in the World Junior Championship due to a hand injury. In nine playoff games for the Generals he scored 1 goal with 2 assists and was -2 with 20 penalty minutes.
Lessio is an offensively gifted winger with good speed and puck skills. He has an athletic build and possesses the ability to play either a power game or a finesse one.
Lessio had an injury really tarnish what could have been a big 2012-13 for him. He missed a big amount of time with Oshawa and a chance with Canada’s U20 WJC team with hand surgery. However he came back strong and closed his final year with the Generals in style as well as performing well in a short stint with Portland in the AHL. Lessio will join Portland full time in 2013-14, and he remains one of the brightest Coyote prospects.