Simplify the following text for a Grade 8 native English-speaking person.
Original: He rekindled his feud with The Undertaker , defeating him at SummerSlam following a distraction from his father . Two months later , Orton and his father Bob Orton defeated The Undertaker in a Handicap Casket match .
Simplified: He started his feud with the Undertaker again defeating him at Summerslam in a Casket Match .