Simplify the following text for a Grade 6 native English-speaking person.
Original: Redknapp started his career at Tottenham Hotspur as a youth player but turned down their offer of a contract to play for Bournemouth under his father , manager Harry Redknapp , before going on to play for Liverpool where Redknapp will be remembered for his best performances .
Simplified: His father , Harry Redknapp , is the manager of Portsmouth F.C.