The German second tier football team has shown interest in signing the player, local media reports.
The 27-year-old player is without a team after parting ways with Iranian giant Persepolis.
Belgian clubs Brugge and Gent had also shown interest in signing Rezaeian.
Rezaeian is a main player in the Iranian national football team (also known as Team Melli).
He has made 19 appearances for Team Melli and scored two goals.