(It may not) but it could be as simple as this....
The Chiefs are true to their word. They don't take a safety high and draft Bulaga...then there is a good chance the Browns take Berry with number 7 and Clausen drops to the Bills.
OR
The Chiefs actually take Berry, the Browns don't pass on Clausen, and Bulaga drops to us.
Of course, none of this takes into account Crazy Al from Oakland.