Simplify the following text for a Grade 5 native English-speaking person.
Original: Haye won the WBA Heavyweight title with a majority decision over Nikolai Valuev in November 2009 , before defending the title against John Ruiz and Audley Harrison in 2010 .
Simplified: In October 2009 , he beat Nikolai Valuev , who is 7 feet tall , to become the WBA champion . In 2010 , he beat John Ruiz .