Parayko (upper body) won't play against Detroit on Saturday, per Chris Pinkert of the Blues' official site.
Parayko is day-to-day and will miss at least one game. He has chipped in four assists, 19 shots on goal, 26 blocked shots and nine hits in 13 appearances this season. Theo Lindstein will replace Parayko in Saturday's lineup against the Red Wings.