USA TODAYAlex Smith, Chiefs OK four-year contract extensionNFL.comDays before the NFL season opens, quarterback Alex Smith and the Kansas City Chiefs are finishing up a four-year extension worth roughly $17 million per year that includes $45 million in guarantees, NFL Media Insider Ian Rapoport reports per a source ...AP Source: Chiefs' Smith Agrees to 4-Yr ExtensionABC NewsReport: Alex Smith signs four-year, $68M contractCBSSports.comChiefs reach new four-year deal with quarterback Alex SmithMiamiHerald.comUSA TODAY -FOXSports.com -SB Nationall 28 news articles »