Odejayi was booed off by his own fans against Southampton, after he missed a string of chances at goal. He himself admitted about his poor performances and promised the fans he would step it up and he did in the FA Cup, scoring of one of the most important goals in the club history when he secured a 1–0 victory at Oakwell, in the quarter finals of the FA Cup 2008 against Chelsea. On 6 April 2008 in the FA Cup semi-final against Cardiff City he missed an absolute sitter to score when he was put clean through on goal only to shoot wide, costing Barnsley the chance to equalise and possibly reach the FA Cup Final for the first time since 1912.