Aug. 13, 2016 6:41 PM PT7:41 PM MT8:41 PM CT9:41 PM ET1:41 GMT9:41 AM 北京时间6:41 PM MST8:41 PM EST8:41 PM CT5:41 UAE (+1)21:41 ET0:41 - Frederick reached agreement Saturday on a six-year contract extension worth an estimated $56.4 million, according to published reports. Analysis: The deal, which contains $28.2 million in guaranteed money, will make Frederick one of the highest-paid centers in NFL history. Miami's Mike Pouncey, who signed a five-year, $52.5 million deal in 2015, makes an average of more than $10 million per season. Frederick has been a Pro Bowl selection in each of the past two seasons and has started all 48 games in his first three NFL campaigns.