This is from NFL.com The transition tag allows any team to negotiate with the top center on the market (once free agency opens Tuesday at 4 p.m. ET), but it also allows the Cleveland Browns an opportunity to match the offer. It has been widely speculated that the Browns will go out of their way to hang onto their Pro Bowl center, who hasn't missed a snap in five years. Mack's agent, Marvin Demoff, told TheMMQB.com's Peter King that he believes he could craft a contract that would be tough for the Browns to match. "I'm confident we can come up with a structure that would have a reasonable likelihood to not be matched by the Browns -- and would be in full compliance with the Collective Bargaining Agreement," Demoff said Monday night. ------ So I think it doesn't necessarily have to be the price of the tag. We could make any offer and the Browns would have to match it,