Dominik Plechatý grew up in Sparta. In the first half of the season 2018/19 was on loan in Vlašim. During the winter pre-season Plechatý worked hard and got to the first team for the second part of the season. In the 2019/2020 season, he was on loan in Jablonec to have more experiences. He returned to Sparta before 2020/2021 season.