Career
Baier began his career with Kickers Offenbach, making his debut in November 2007 as a substitute for Denis Epstein in a 2–1 defeat to SpVgg Greuther Fürth in the 2. Bundesliga. Offenbach were relegated at the end of the 2007-2008 season, and Baier spent the following two years playing for the club in the 3. Liga, before joining RB Leipzig of the Regionalliga Nord in 2010.
A year later he returned to the 3.
Liga, and Hessen, to sign for SV Darmstadt 98. Baier would leave the club at the end of the season, though, joining Regionalliga West side Rot-Weiss Essen.