Simplify the following text for a Grade 8 native English-speaking person.
Original: Sergio PÃ rez Mendoza ( born January 26 , 1990 in Guadalajara , Jalisco ) , also known as `` Checo '' PÃ rez , is a Mexican racing driver .
Simplified: Sergio PÃ rez ( born January 26 , 1990 in Guadalajara , Jalisco ) , also known as `` Checo '' PÃ rez , is a Mexican racing driver .