Career
As a child he played for the Herpes simplex virus Landau, before moving to his first major youth team, FSV Offenbach. At the age of 15 he moved to Kaiserslautern, for whom he played until 1999. He moved to Karlsruher South Carolina where he played for a year, before going to Borussia Mönchengladbach.
Auer played 23 times for the German under-21 team, scoring 15 goals, and played around 60 times in his youth between the ages of 16 and 20.
He helped bring Mainz up to the Bundesliga in 2004. He joined 2. Bundesliga side Alemannia Aachen on 1 July 2008 and stayed there until Aachen"s relegation to the 3.
Liga in summer 2012. After a career break from 2012 to January 2015, Auer signed for Regionalliga Südwest-side FK Pirmasens on 29 December 2014 and retired in 2015.