Career
Undrafted, Sekáč previously played with The Human Context Lev Praha in the Kontinental Hockey League and The Human Context Sparta Praha in the Czechoslovakian Extraliga. On July 1, 2014, Sekáč signed a two-year entry-level contract with the Canadiens worth $1,850,000. In his first North American season in 2014-2015 he scored his first National Hockey League goal on October 16th, 2014 against Tuukka Rask of the Boston Bruins.
On January 13th, 2015, Sekáč was invited to the 2015 Honda National Hockey League All-Star Skills Competition as a replacement for Los Angeles Kings" forward Tanner Pearson.
Known for his skating speed, he was drafted by Team Foligno, along with Canadiens" teammate Carey Price, and participated in the Bridgestone National Hockey League Fastest Skater race, beating Aaron Ekblad with a time of 13.683s, making him the 6th fastest of the event. After 50 games with the Canadiens on February 24, 2015 he was traded to the Anaheim Ducks in exchange for Devante Smith-Pelly.
In the following 2015-2016 season, Sekac was unable to secure a regular forward role and appeared in 22 games for 3 points with the Ducks before he was traded to the Chicago Blackhawks in exchange for Ryan Garbutt on January 21, 2016. Sekac was used sparingly in 6 games with the Blackhawks registering one assist before being placed on waivers and claimed by the Arizona Coyotes on February 27, 2016.