KANSAS CITY, Mo. — Even under the glare of Monday Night Football, even up against a team they still love to hate in this Vegas version, even after being doused in cold water two weeks ago in Indianapolis, the Chiefs inexplicably showed up sleepwalking on Monday night at Arrowhead Stadium. Maybe somewhere inside they figured they could fall back on Andy Reid’s 15-3 record against the Raiders since he arrived in Kansas City. Maybe they just didn’t take them seriously enough with their 1-3 record or after clobbering them 41-14 and 48-9 last season. And perhaps having Buffalo coming up next didn’t…
