King of the Ring had a match and the one who defeated The Rock was which American WWE professional wrestler born on March 24, 1965? 
King of the Ring (1999):  The other main match was a WWF Championship match where The Undertaker defeated The Rock to retain the title. The Undertaker: Mark William Calaway (born March 24, 1965), better known by his ring name The Undertaker, is an American professional wrestler signed to WWE.
The Undertaker