Simplify the following text for a Grade 6 native English-speaking person.
Original: Warner started the 2004 season as the Giants ' starting quarterback , winning five of his first seven games , but following a two-game losing streak , highly-touted rookie quarterback Eli Manning was given the starting job .
Simplified: He began the 2004 season as the main quarterback . He won five of his first seven games , but after not playing well in a two-game losing streak , rookie quarterback Eli Manning was made the main quarterback .