Early career Müller began his career with TSV Wernfeld aged 11. In 1998, he joined
Eintracht Frankfurt who had just won the
2. Bundesliga. He played for
Die Adler until 2003, when he joined
SpVgg Greuther Fürth.
Greuther Fürth In 2006, Müller moved up to Greuther Fürth II in the
Bayernliga. He would play for Fürth's reserves for the next three years until midway through the 2008–09 season, when he was loaned out to
3. Liga side
SV Sandhausen, who he helped to an eighth-place finish in the first ever 3. Liga campaign. For the next season, Müller returned to Greuther Fürth. He finally broke into the first team with the Cloverleaves in the 2009–10 season and continued to play for the first team in 2010–11. This would be his last year with Fürth, though they finished fourth, as at the end of the season Müller joined
Mainz 05.
Mainz 05 Müller signed a contract lasting until 2015 with the
Bundesliga club. His debut came against
Hannover 96 in August as a substitute for
Eric Maxim Choupo-Moting in the last minute. His first start came three games later against
Borussia Dortmund and he scored his first Bundesliga goal.
Hamburger SV On 6 August 2014, Müller joined
Hamburger SV signing a four-year contract. His debut for HSV came on the third matchday against Hannover 96 in the 2–0 loss at the
HDI-Arena. After the game, Hamburg coach
Mirko Slomka left the club and
Josef Zinnbauer took charge for the next match against
Bayern Munich, in which Müller started and received his first booking for a 59th-minute foul on
Dante. Müller scored Hamburg's first goal of the
2014–15 season when he equalised against
Eintracht Frankfurt on 28 September 2014. HSV eventually lost the game to a
Lucas Piazon free-kick in the last minute. HSV avoided relegation through the relegation play off for the second successive season in Müller's debut year, as he came on as a substitute and scored a 115th-minute winner during the
relegation play-off game that took place at the end of the
Bundesliga season, against
Karlsruher SC. Müller's goal ensured that HSV would stay in the Bundesliga for the next year, keeping their unique status as the only team to have played in the Bundesliga for every year since its formation, as they won 3–2 on aggregate. On 20 August 2017, the first matchday of the
2017–18 Bundesliga season, Müller got injured while celebrating scoring a goal against
FC Augsburg. Medical examination confirmed that the striker had ruptured the
ACL in his right knee and would be out for approximately seven months. He returned to the pitch on matchday 33, in a 3–0 defeat away to
Eintracht Frankfurt.
Western Sydney Wanderers In October 2019, Müller joined Australian club
Western Sydney Wanderers as an injury replacement for
Radosław Majewski.
Central Coast Mariners On 26 July 2021, Müller signed with Australian club
Central Coast Mariners on a one-year deal. After his spell at the team in
New South Wales he retired from pro football after 240 top-flight matches in Germany and Australia. == International career ==