It was Sinclair, fed by Cole's incisive ball, who set up Steve Lomas to double West Ham's lead and the midfielder then nodded Lomas's cross back across goal for Jermain Defoe to head into an empty net.
A miserable nine away goals is graphic evidence of Sunderland's poverty and while Peter Reid accused his players of 'caving in', his unwillingness to go ballistic perhaps signalled an acceptance he might be employed elsewhere come summer.