The 24-year-old scored 24 tries in 80 appearances for Bradford since joining as a teenager. However the fullback/winger has only recently returned to action having recovered from a knee reconstruction.
Halley commented “Having been given the medical all clear, I need regular first team rugby at full back and am excited to join player-coach Jason Demetriou in the Cougars’ battle for promotion from Co-operative Championship One.
“Plans for the 2012 season will then be addressed. I have thoroughly enjoyed my eight years at Odsal Stadium but am excited by the new challenges ahead.”
Bulls Football Manager Stuart Duffy said “We fully understand Dave’s position and his chances at Bradford would be limited, therefore we have jointly taken the decision to release him from the rest of his contract to enable him to join Keighley.
“We would like to thank Dave for exemplary service to the Bulls and we wish him every success in the future”