[1] Müller played as a youth for a number of Westphalian clubs, including Arminia Bielefeld, SC Paderborn and SC Verl, and it was at Verl that he made his breakthrough in senior football, being promoted to the first-team squad for the beginning of the 2010–11 season.
He made 15 appearances in the Regionalliga West during the first half of the season, which attracted the attention of Bayern Munich, whom he joined in January 2011.
He went straight into Bayern's reserve team, intended to replace David Alaba, who had joined 1899 Hoffenheim on loan, and made his 3.
[2] After two years with Düsseldorf without making a first-team appearance, Müller signed for Alemannia Aachen of the Regionalliga West.
This biographical article related to association football in Germany, about a midfielder born in the 1990s, is a stub.