Pittsburgh's offense wasn't playing its sharpest game, either. It may have been only 25 total yards short of the Chiefs, but it was severely outmatched through the air: it scored no passing touchdowns to Patrick Mahomes' three as he out-tossed Steelers quarterback Russell Wilson by 115 yards.

With their loss to the Chiefs on Christmas, the Steelers have lost three straight. So who's to blame for this one?

The Pittsburgh Steelers have played one of the most brutal schedules in the NFL over the past three weeks and things definitely have not gone well during that span. Starting in Week 15, the Steelers had to play three games in 11 days and the team responded by getting blown out in all three games.