McIver released squad member Chrissy McKaigue to play for UUJ in Sunday's game against Antrim.
But the club are preparing for their campaign outside the top flight by releasing 11 squad players.
Emanuel and Chicago police have been under heavy scrutiny since the city, under court order, released a squad car video last month showing white officer Jason Van Dyke shooting black 17-year-old Laquan McDonald 16 times in 2014.
Where Christopher Nolan's Batman trilogy pitched a Gotham City closer to reality than any previous big or small screen iteration, the recently released Suicide Squad suggests Warner Bros wants its new universe populated largely with larger-than-life, mega-powered meta-humans.
McIver released his squad member Chrissy McKaigue to play for UUJ in Sunday's game against Antrim.
However, the Tyrone county board later released a squad list which did not include the names of Canavan, Tierney, McNulty and McGuigan, who is a brother of Brian McGuigan.
EXTRA POINTS The Giants juggled their practice squad, releasing receiver DEREK DORRIS and signing ATAVEUS CASH.
A white Chicago police officer has been charged with murder over the shooting death of a black teenager, just one day before a deadline by which a judge has ordered the city to release a squad-car video of the incident.
By the time the four student hostages were released, a bomb squad, SWAT team from Jefferson County, and agents from the Bureau of Alcohol , Tobacco Firearms and Explosives were sent to the scene.
In the summer of 1983, Jim McLaughlin replaced Noel Campbell as Rovers' manager, after a successful period at Dundalk. Louis Kilcoyne made money available to McLaughlin who responded by selling and releasing almost the entire squad he had inherited from the Giles era, including fans' favourite, Alan O'Neill, while retaining the services of Liam Buckley, Harry Kenny, Alan Campbell and Peter Eccles.
