One of the new breed in this squad to have come through since Joachim Low was appointed national coach, Trochowski is another of Polish birth.
Trochowski featured on a regular basis during qualifying for the World Cup and is expected to be in contention for a starting place in South Africa.
He is a member of the Hamburg team which impressed in the Europa League this season and was involved in the Bundesliga title race.
Hailing from Tczew, the 26-year-old has long been earmarked as a future international, and played for Germany's Under-20s in the 2003 World Youth Championship.
The inventive attacking midfielder with a thunderbolt of a shot made his international debut against Georgia in 2006 but only really became a mainstay towards the end of the Euro 2008 qualification programme.
Having played just 13 minutes in the opening half of the campaign, Trochowski then featured in five successive games, including three starts, before finding himself back on the bench for the last clash with Wales.
He then scored the winner against Wales in World Cup qualifying in a 1-0 victory for Germany in October 2008.