Simplify the following text for a Grade 4 native English-speaking person.
Original: Foaled , or born , in 1951 , Lightning Bar was bred to be a race horse , but injuries and bouts of illnesses kept him from racing past the age of two .
Simplified: Born in 1951 , Lightning Bar was bred to be a racehorse . Injuries and illnesses kept him from racing past the age of two .