For Andy Reid's Chiefs, the problem that dogged them throughout last season, even as they reached a third successive Super Bowl, has persisted, with quarterback Patrick Mahomes shackled by an anaemic offense. Kansas City did at least claim a first win of the season last week as they saw off the New York Giants 22-9 on the road, but that success did little to win over the doubters that are growing in number amid the Chiefs' continued struggles.