Peter Hartley is an English former professional footballer who played as a centre-back. Hartley began his career at Sunderland, during which time he had a spell on loan at Chesterfield. He then went on to play for Hartlepool United, Stevenage, Plymouth Argyle, Bristol Rovers and Blackpool and in August 2017, he signed for Motherwell, initially on loan, making the move permanent in January 2018. Wikipedia