2009-10: Anton Slepyshev skated for Dizel Penza's second men's team in his eastern Russian hometown of Penza. In 39 games he scored 12 goals with 9 assists and had 10 penalty minutes as Dizel-2 finished seventh in the 13-team league. Slepyshev scored 1 goal with 1 assist and had 4 penalty minutes in four playoff games. In six games of Povolzhie regional youth hockey with Dizel Penza's 1994's, he scored 16 goals with 9 assists and had 4 penalty minutes.
2010-11: Slepyshev played a second season with Dizel-2 and represented Russia at the 2012 U18 World Junior Championship, the U17 Four Nations Tournament in Illinois and U17 European Youth Olympic Festival. In 20 games for Dizel-2 he scored 8 goals with 4 assists. Slepyshev scored 3 goals with 1 assist and was minus-one in six games at the U18 WJC. Russia defeated Canada in the bronze medal game. He had two assists in four games at the Four Nations Tournament and scored three goals in three games for Russia at the EYOF. Slepyshev was the first overall pick in the 2011 KHL Draft; selected by Metallurg Novokuznetsk.
2011-12: Slepyshev appeared in 39 games for Novokuznetsk as a KHL rookie, splitting the season between the KHL and Metallurg's MHL (junior) squad Kuznetskie Medvedi. He was the captain for Russia at the 2012 U18 World Junior Championship. He averaged just under nine minutes of ice time per game with Metallurg and was minus-eight with 4 goals and 3 assists. In 13 games with Medvedi he scored 7 goals with 2 assists and was plus-11 with 6 penalty minutes. He had 1 goal and was an even plus-minus in three playoff games. Slepyshev was ranked 10th amongst European skaters in Central Scouting's final rankings prior to the 2012 NHL Draft.
2012-13: Slepyshev played in Russia's KHL as an 18-year-old and represented Russia at the 2013 World Junior Championship in Ufa. After skating in 15 games for Metallurg Novokuznetsk, scoring 3 goals while finishing -5 with 2 penalty minutes, he was obtained by Salavat Yulaev in a mid-season trade. He scored 4 goals with 2 assists and was +3 with 2 penalty minutes in 11 regular season games. Salavat reached the East Conference semifinals and Slepyshev played in 14 playoff games. He was -2 with no points nor penalty minutes. In seven games at the WJC he had 1 assist and was +4 with 4 penalty minutes. Russia defeated Canada, 6-5, in overtime to capture the bronze medal. Ranked 20th amongst European skaters in Central Scouting's final rankings, he was selected by Edmonton in the third round (88th overall) of the 2013 NHL Draft.
Slepyshev is a big winger with great hands and a blazing top speed. When combined with his strong hockey sense in the offensive zone, he is tough to catch. His physical game needs a bit of work and he sometimes does not dig as deep into tough areas as he should.
Slepyshev has already spent time in the KHL and has a year left remaining on his professional contract in Russia. This will give him time to continue to develop his game at a high level before making the jump to North American hockey.