What the words mean
The line
The spread
Suppose a row reads BUF -7.5. The minus sign marks the favorite and the number is the margin it is expected to win by; the other club is the underdog at +7.5. It is not a forecast of the final score, it is the handicap that makes the two sides an even bet. Every spread on this site is captured before kickoff and frozen there, and the live number moves - the one on the board today may not be the one you see quoted elsewhere.
Favorite and underdog
The minus always attaches to the favorite, and the abbreviation in front of it names that club. “KC -6.5” means Kansas City is favored by six and a half. Where a team page shows “—” in the line column, no line has been posted for that game yet. The predictor starts every game on the favorite, so an untouched board is the market's opinion, not yours.
The total (over/under, O/U)
It sits after the spread on each row, and the matchup page writes it as “total 44.5”. Over means the two clubs together score more than that number, under means fewer. The total says nothing about who wins: a 3-0 game and a 24-21 game are opposite results here and can be the same result on the spread.
Push
A 7-point favorite that wins by 7 has not covered; that is a push. The same goes for a total of 44 in a game that ends 24-20. This is why most lines carry a half point: -6.5 and O/U 44.5 cannot land on the number, so they can only win or lose. Whole numbers do appear, and those can push - which is why the betting-record cards count pushes in their own column instead of folding them into losses.
Against the spread (ATS)
A club that wins by 3 as a 7-point favorite won the game and lost against the spread. Every ATS record on this site is accumulated from lines captured before kickoff and frozen at kickoff, never reconstructed afterwards, and every rate is printed with the number of games behind it.
The season
Week
Games run Thursday through Monday, so a “week” on this site is the league's own week number rather than a calendar one. 18 weeks and 17 games do not match on purpose: the difference is the bye week.
Bye Week
Every club gets exactly one, and it falls between weeks 5 and 14. A club on its bye is not missing from the schedule and not on a losing run - it simply has no game, and its team page says so in place of a row. A gap anywhere outside that range is not a bye week; it is a schedule this site has not finished reading, and it is reported as one.
Division
AFC East, North, South and West; NFC East, North, South and West. The four clubs in a division play each other twice a season, home and away, which is six of the seventeen games. Winning your division is the only thing on the schedule that guarantees a playoff place, and it outranks any wild-card record.
Conference
A club's conference record is its record against the other fifteen clubs in its own conference. It matters because it is step four of the division tiebreaker and step two of the wild-card tiebreaker - the earliest thing that separates two clubs from different divisions.
Common games
Two clubs tied in the standings are compared over the opponents they share, which for two clubs in the same division is most of the schedule. It is step three of the division tiebreaker. In a wild-card tie there must be at least four common games before the step counts at all.
Tie
Records are written won-lost-tied - 9-7-1 - and the percentage that orders the standings treats the tie as half a win, so 9-7-1 is .559. Ties are rare and they decide divisions; this site never rounds one away or counts it as a loss.
The playoffs
Seed
Seeds 1 to 4 are the four division winners, ordered by record. Seeds 5, 6 and 7 are the three best clubs that did not win a division. The seed decides who plays whom and who is at home; it is not a ranking of how good a club is, and a division winner is seeded above a wild card with a better record.
Wild card
The three best remaining records take seeds 5, 6 and 7 and play on the opening weekend, always on the road. “Wild Card” is also the name of that round, which is why a club can be a wild card in the Wild Card round or, as the 2, 3 or 4 seed, host one.
The bye (playoff)
It is a week of rest and a guaranteed home game against whoever survives. Until the 2020 season each conference sent six clubs and rested two; since then it has been seven and one, which is why the 2 seed is worth much less than it once was.
Reseeding
It is not a fixed ladder. If the 7 seed beats the 2 in the opening round, the 1 seed plays the 7 next - not whoever was drawn on that side. Every round before the final is hosted by the higher remaining seed, so surviving is worth more than the path you were given.
Clinched and eliminated
On this site a club is in when nobody left in its division can reach it even if it loses every game it has left, or when at most two clubs in the conference can finish above it at all. It is out only when both roads are shut: someone in its own division is past its best possible finish AND so are 7 clubs in the conference. Seven clubs ahead is not on its own enough, because a division winner is seeded above every wild card whatever the records say. All of it is bounds rather than simulation, and anything a tiebreaker could still decide is left open. The league's own clinching scenarios go further; this site does not run them and does not claim to.
Strength of victory
Step five of the division tiebreaker and step four of the wild-card one. Two clubs on the same record are separated by who beat the better teams. It follows from a completed pick sheet, unlike the steps after it, which need points scored and points allowed.
Strength of schedule
TWO THINGS SHARE THIS NAME AND THEY ARE NOT THE SAME. The tiebreaker's version is the combined won-lost-tied record of every opponent played, and it is step six. This site's team pages show a different number: the mean efficiency margin of the opponents, which is a rating rather than a record. Where a page means the tiebreaker it says so.
The Super Bowl
The AFC and NFC champions meet. It is the only game in the postseason not hosted by the higher seed, and the venue is fixed long before anyone knows who is in it.
The numbers
PF/G and PA/G
They are averages, which is the only way the column means anything once clubs have played different numbers of games - and in this league they do from the first bye week on. A club at 24.1 PF/G and 19.8 PA/G is outscoring its opponents by a little over four points a week.
Streak
W3 is three straight wins, L2 two straight losses. It resets on any different result, including a tie, and it is empty before a club has played. It counts finished games only: a game in progress is a score on the board, not a result.
Efficiency margin
A club at +5.6 is about five and a half points a game better than an average one, and the two halves of that - offense and defense - are published separately. It comes from The Gridiron King, a sister site. This site consumes the published number and does not recompute it. It is used to order clubs before any game is played and to pick a default winner where no betting line exists - never to seed the playoffs, which this league decides on record alone.
TBD
Every postseason game is TBD until the clubs are decided. A TBD game has no line, no rating and no preview, and it is left out of anything that ranks games rather than given a placeholder value.