Simplify the following text for a Grade 5 native English-speaking person.
Original: Gaunt refused to negotiate Robson 's contract , so Robson placed a transfer request and was sold to Fulham for Â # 20,000 in a deal which doubled his salary . Soon after Robson joined Fulham , the club sold Alan Mullery and Rodney Marsh , meaning Robson 's chances of securing any significant honor there were substantially reduced .
Simplified: Fulham sold some important players after Robson came back to the team .