Simplify the following text for a Grade 9 native English-speaking person.
Original: Brian Knighton ( born April 21 , 1971 ) also known as Axl Rotten is a wrestler American professional wrestler that wrestled for the original ECW and WWE .
Simplified: Brian Knighton ( born April 21 , 1971 ) is an American professional wrestler better known by his ring name , Axl Rotten .