As a result of his hometown play, Sekera was drafted second overall by the Owen Sound Attack of the Ontario Hockey League (OHL) in the 2004 Import Draft. A few days later, Sekera was drafted 71st overall by the Buffalo Sabres of the National Hockey League (NHL) in the 2004 NHL Entry Draft. During his first season in the OHL, Sekra finished the regular season with 28 points in 51 games to rank seventh on the team in scoring. The following year, Sekra won the Max Kaminsky Trophy as the OHL's most outstanding defenceman.
