Simplify the following text for a Grade 8 native English-speaking person.
Original: After BMW announced they were leaving Formula 1 in 2009 , Kubica joined the French team Renault F1 .
Simplified: On 29 July 2009 , BMW announced that they would leave Formula One at the end of 2009 , which made Kubica a free agent for the season . For the 2010 season , it was announced that he had signed for Renault F1 , the team he tested for during his junior career .