Claim: 2016–17 I liga had eighteen teams, one of which was Górnik Zabrze which was promoted to Ekstraklasa.
Evidence: In June 2010, the club earned promotion back to the Ekstraklasa for the 2010–11 season. Bytovia Bytów Chojniczanka Chojnice Chrobry Głogów GKS Katowice GKS Tychy Górnik Zabrze Miedź Legnica MKS Kluczbork Olimpia Grudziądz Podbeskidzie Bielsko-Biała Pogoń Siedlce Sandecja Nowy Sącz Stal Mielec Stomil Olsztyn Wigry Suwałki Wisła Puławy Zagłębie Sosnowiec Znicz Pruszków