Original sentence: Having been an unused substitute in a number of first-team matches in the 2008-09 season, he signed a contract with the senior team from July 2009, along with team-mate Thomas Müller
Edited sentence: Badstuber has progressed through Bayern's youth setup and reserve team and signed a contract with the senior team from July 2009, along with team-mate Thomas Müller, having been an unused substitute in a number of first-team matches in the 2008-09 season