The San Francisco 49ers are off to a 4-1 start, which has them in sole possession of first place in the NFC West at roughly the quarter pole of the season.
All of their games have been decided by five points or fewer, and three of their four wins (at Seattle Seahawks, at New Orleans Saints, at Los Angeles Rams) have come via defensive stops to close out the contests, including two sack/fumbles and a turnover on downs.
But that isn't the most bizarre part of this start to the Niners season, even though those quirks in and of themselves would be enough on their own.