How old was Dominik Volek when he made his Czech Extraliga debut?

Dominik Volek (born January 12, 1994) is a Czech professional ice hockey player. He is currently playing for HC Sparta Praha of the Czech Extraliga.[1]

Volek made his Czech Extraliga debut playing with HC Sparta Praha during the 2014–15 Czech Extraliga season.[2] Volek is the son of former New York Islanders forward David Volek.

Dominik Volek was 20 years old. He debuted in 2014 and was born in 1994, so 2014-1994 = 20.