Complex sentence: On 27 December 2008, Northampton terminated Henderson's contract with immediate effect after Henderson did not start a game for the Cobblers during the 2008--09 season and he had failed to score in 33 first-team appearances.
Split into simpler sentences: On 27 December 2008, Northampton terminated Henderson's contract with immediate effect after Henderson had not started a game for the Cobblers in the 2008--09 season. He had failed to score in 33 first-team appearances.