Fifty-six-year-old Hockaday was a shock appointment by the Italian on June 19 and now, 10 weeks later, he has lost his job.
Hockaday - who listed Forest Green as his only managerial experience prior to taking the Leeds job - has lost four of his six games in charge.
Hockaday's assistant, Junior Lewis, has also lost his job and Neil Redfearn will lead the team against Bolton on Saturday.
Hockaday took training on Thursday morning and was then told to leave the club.