Jamaica international winger Daley has not featured for Stuart McCall's side this season due to a cruciate knee ligament injury sustained in February but has targeted a return to action with the reserves next week.
Midfielder O'Leary, a summer signing following his release from Hereford, broke his toe on his debut for Bradford against Port Vale in August and will also be handed a reserve-team run out to build up his match fitness.
Both players could return to contention for Bradford's next home game, against O'Leary's former club Hereford, a week on Saturday.
Source: Team_Talk