Last week, the 49ers were 12th in NFL.com's power rankings. This week, they're 18th. Which means they're not good. And they're ranked this low because they lost to the Rams and the Cardinals who are ranked 27th and 22nd respectively.

The NFL has had many good weeks in a row now, with bottom-feeding teams coming up and beating some of the better teams. That makes it difficult to rank the teams in terms of a power ranking. After five weeks,

The defeat comes two weeks after San Francisco (2-3) blew a 10-point lead in the fourth quarter in a 27-24 road loss to the Los Angeles Rams, but the 49ers have little time to dwell on it with a trip to first-place Seattle coming Thursday night.

Another fourth-quarter collapse led to another San Francisco 49ers’ loss against an NFC West rival on Sunday. Two weeks after faltering on the road to the Los Angeles Rams, the 49ers blew a 10-point lead and exited with a 24-23 loss to the Arizona Cardinals,

Even the kicker suffered an injury, and it probably cost them a winnable game. The 49ers had a 10-point lead in the fourth quarter on Sunday and everything seemed fine, but then there was an implosion.