Before the Kansas City Chiefs even took the field in Seattle to battle the Seahawks, most figured it would be a trying night for one of football's last undefeated teams. That certainly proved to be the case in Week 7, as head coach Andy Reid's crew got throttled in prime time.

The hosts came out firing on the Sunday Night Football stage, taking advantage of the visitors' shorthanded offense and also making the most of favorable matchups on the other side of the ball. Kansas City did attempt to snap out of its funk in the second half of play, yet it never got close and wound up dropping a brutal game by a final score of 20-3.

Here are 10 instant observations and Chiefs takeaways from Week 7.

10: A Cyrus Allen sighting right out of the gate... then a disappearance

It feels like forever ago that fifth-round rookie wide receiver Cyrus Allen was dazzling during the summer and becoming a fan-favorite player, but in reality, it's only been a few months.…