Nils Petersen spent the entire 2012-13 season on loan with Werder Bremen and has now officially completed a transfer to them. The deal is for four years, and while a transfer fee is not being publicly released, Kicker speculates that the deal is likely for around €3 million. That's roughly the same amount that Bayern paid for him.
Petersen, 24, never really settled in Munich during his one season. Unfortunately for him, he joined a team with Mario Gomez and Ivica Olic up top. Gomez started nearly every single match for Bayern last season and scored goal after goal after goal after goal.
The move to Bremen was a big boost for him giving him all the playing time he could have desired. He started 31 matches for Werder in season and played in all 35 competitive fixtures. Even though Werder were awful this year, Petersen banged in eleven goals to lead the club.
Allowing Petersen to depart for Werder makes too much sense for Bayern. He's just not good enough to play regularly in this team, and he'll obviously get more playing time at Werder. Thanks for your season of play at the club, Nils. Good luck in the future with Werder except, of course, against Bayern.