Keane and Lingard will surely relish the prospect of some first-team football with a temporary move to Leicester City. The Championship promotion-chasers signed a pair of Reds Reserves in the summer, with Ritchie De Laet and Matty James joining the Foxes, and are to strengthen their squad further with a shrewd double acquisition.
Centre-back Keane performed well in the Capital One Cup ties against Newcastle and Chelsea while livewire Lingard has been in and around Sir Alex's squad a few times after impressing on the DHL tour.
Brady, a full Republic of Ireland international, is to rejoin Hull City and play under Steve Bruce. The winger spent last term with the Tigers and is expected to link up with team-mate Ben Amos at the KC Stadium.
All three were not involved in the Under-21s' 1-1 draw with Stoke City on Monday night with Joyce admitting afterwards that the deals are set to be completed.