1 fatal flaw, including Brock Purdy's downfield yips, for each Super Bowl 58 contender

Purdy's downfield struggles against the Packers, rain or not, are a concern. Fortunately, he faces a leaky Lions secondary.

282 NFL games have been played this season. Three remain, along with four teams with dreams of a Super Bowl 58 victory still intact.

That means the winter will conclude with disappointment for 75 percent of the teams still in the hunt for the Vince Lombardi Trophy. With 20 weeks of regular season and playoff data from which to work, we have a reasonable idea of how things might end.

All of our final four teams — the Baltimore Ravens, Kansas City Chiefs, Detroit Lions and San Francisco 49ers — have flaws that could finish their seasons, loose strings that could unravel everything for which they’ve worked. In some cases, it’s clear. In others it takes a little digging to find.

Let’s talk about these flaws, moving from least serious to most.