The 2012–13 FC Bayern Munich season was the 114th season in the club's history and the 48th consecutive season in the top flight of German football, the Bundesliga, since the promotion of the team from the Regionalliga Süd in 1965. Before the start of the season, Bayern signed Xherdan Shaqiri, Dante, Claudio Pizarro, Mitchell Weiser, Tom Starke and Mario Mandžukić. Bayern also added holding midfielder Javi Martínez after the first week of the Bundesliga season at the transfer deadline. The club started the season with a nine-match winning streak. The club would end the season claiming the Treble, winning the Bundesliga, the UEFA Champions League and the DFB-Pokal. Bayern are the first German club to achieve the Treble and are the third European Club to complete the Treble in the last five seasons and seventh ever in European Club competition.

Xherdan Shaqiri,Claudio Pizarro,Tom Starke,Dante,Mario Mandžukić,Mitchell Weiser,Lukas Raeder, and Javi Martínez transferred to Bayern Munich in the summer transfer. The transfer of Javi Martínez, at €40 million, is the most expensive transfer in the history of the Bundesliga.Takashi Usami,Breno,Rouven Sattelmaier,Ivica Olić, and Danijel Pranjić left Bayern, Hans-Jörg Butt retired, and Nils Petersen was loaned to Werder Bremen. Hans-Jörg Butt was appointed head of the Bayern Munich Junior Team on 1 July; but Hans-Jörg Butt left the position on 7 August.Wolfgang Dremmler was appointed his successor on 9 August. On 2 July, the club announced that Matthias Sammer replaced Christian Nerlinger during UEFA Euro 2012.Jupp Heynckes believed that the 2012–13 squad is better than the previous season's squad.

...
Wikipedia