Simplify the following text for a Grade 5 native English-speaking person.
Original: Following in the footsteps of recent F3000 graduates such as Juan Pablo Montoya and Bruno Junqueira , Bourdais moved to Champ Car racing in the United States and joined Newman-Haas Racing for the 2003 CART season .
Simplified: Bourdais moved to Champ Car racing in the United States . He and joined Newman-Haas Racing for the 2003 CART World Series season .