Mezue ahịrịokwu na-esonụ: Slepyshev bụ onye mbụ họpụtara na 2011 KHL Junior Draft site na Metallurg Novokuznetsk. N'etiti oge 2012-13, nke abụọ ya na Kontinental Hockey League, ọ si Metallurg kwaga Salavat Yulaev Ufa. Mgbe ndị Oilers họpụtara ya na agba nke atọ (88th n'ozuzu) nke
2013 NHL Entry Draft, Slepyshev nọgidere na Russia iji gaa n'ihu mmepe ya na Salavat.