Born in Cologne, Baier first played for the youth team of TSV 1860 Munich. He generally plays an offensive midfield role. He played in his first league match against 1. FC Köln on 13 September 2003. He has played in the Germany national U20 team, his debut coming on 7 October 2005 against Wales.[2]Dieter Eilts has said about Daniel Baier: "Daniel is an individual talent. He plays a deadly passing game. If he continues in this way, he has a big future." On 31 January 2010, he left VfL Wolfsburg and returned to FC Augsburg.[4]
On 20 September 2017, Baier was fined €20,000 and suspended for one Bundesliga game, as he made a masturbation gesture at RB Leipzig coach Ralph Hasenhüttl during the 1–0 victory against Leipzig the day before.[5][6]
After 355 competitive appearances for FC Augsburg, Baier was released by the club on 23 July 2020.[7]
Baier announced his retirement from professional football on 9 September 2020.[8]
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