The Kansas City Chiefs are undefeated in the last 11 games, but the team’s wild-card victory last weekend was its first postseason win since 1993. The New England Patriots, on the other hand, have won a total of 21 playoffs games under the tandem teamwork of coach Bill Belichick and quarterback Tom Brady – and that’s just to date. In this showdown, the Patriots might well end the Chiefs’ streak, which would be deflating. But at this point in the season, how much deflating does Tom Brady still have left in him?