Simplify the following text for a Grade 7 native English-speaking person.
Original: In the off-season , he contested two rounds of the 2009 â `` 10 GP2 Asia Series for Barwa Addax , ahead of a 2010 main series campaign with the team .
Simplified: In the off-season , he raced in two rounds of the 2009 â `` 10 GP2 Asia Series season for Barwa Addax .