UPDATE: I stand corrected, with the new rules you dont get that space until June 1st when designating a player as a June 1st cut
they get the cap space immediately, designating a player as a June 1st cut just means they spread the cap hit over 2 years instead of just the current year
the Bills have plenty of cap room and can always gain more if needed but just because they have cap room doesnt mean they are going to use it either