By Frankie Taddeo A best bet for Sunday’s AFC championship game between the Bengals and Chiefs. Cincinnati is a small road favorite. Bettors have witnessed a tremendous move in early wagering for the AFC championship line ahead of Sunday’s showdown between the Bengals and Chiefs. Since Sunday night’s opening number was released by SI Sportsbook, Cincinnati has flipped from 1.5-point underdogs to 1.5-point road favorites. There are a multitude of reasons for the dramatic shift, none bigger than the status of Patrick Mahomes’s injured ankle. The Bengals and Chiefs will face off in the AFC champi…