The Detroit Lions' matchup against the San Francisco 49ers was essentially meaningless for the Lions, with the top seed in the NFC playoffs and the NFC North title coming down to Week 18's showdown with the Minnesota Vikings.
That doesn't mean that the game didn't highlight one particularly concerning trend in Detroit.
The defense yet again struggled to slow down an opposing offense, though the electrifying Lions' offense ultimately led the way in a 40-34 shootout win.
And the result might have been closer had San Francisco's Jake Moody not missed two field goals and an extra point, or if Brock Purdy didn't throw a pair of inexplicable interceptions in the second half.