Following Freiburg's relegation from the Bundesliga, Riether signed for Schalke 04 on 23 July 2015, signing a one–year contract and an option of extending for another season.
Following Freiburg's relegation to the second division, Riether signed with Schalke 04 on July 23, 2015, agreeing to a one-year contract and an option for another season.