While playing for Westwood Juniors, Greenwood put up impressive performances that caught the attention of scouts from Manchester United who facilitated his entry into the club's development school at Halifax.
ໃນຂະນະທີ່ຫຼີ້ນຫຼີ້ນກັບ Westwood Juniors, Greenwood ໄດ້ຈັດຕັ້ງການສະແດງທີ່ ຫນ້າ ປະທັບໃຈເຊິ່ງໄດ້ຮັບຄວາມສົນໃຈຈາກນັກຂັວນຈາກ Manchester United ທີ່ ອໍາ ນວຍຄວາມສະດວກໃຫ້ລາວເຂົ້າໄປໃນໂຮງຮຽນພັດທະນາຂອງສະໂມສອນທີ່ Halifax.