The most common arena in which the subject of contracts comes up in media and popular culture is that of contracts to play professional sports.Unlike the rest of the known employment world, it seems to the outside observer that NFL player contracts are more like a fluid, tenuous tie between employer and employee that is forever subject to re-negotiation, than a concrete agreement to perform work for pay.Read the article about the Pittsburg Steelers' negotiations with two of its most notable players available under bookmarks.Note that the the CBA, orcollective bargaining agreementbetween the NFL Players Association and the NFL owners determines some of the terms that are allowed in these contracts, which may differ from those that are standard at common law or in the UCC.In your discussion, discuss whyconditions precedentare so prevalent in these contracts.What are the factors that prompt, or that allow these contracts to be so frequently re-negotiated?