Net rest is the extra number of rest days a team has over their opponent per game, summed over the course of the season.
Last year, three teams had net rest edges of negative-10 days or worse: Packers (-12), Patriots (-10), and Texans (-10). All three fell below their expected win total.
The two teams with the best net rest edges last year, the Bills (+12) and Lions (+11), went over their win totals. Buffalo hit the over despite one fewer game because of the Demar Hamlin injury, and the Lions were one of the most surprising success stories of 2022.
Rest edges also matter for weekly lines.
Last year, teams with a net rest edge of three or more days went 32-24-1 (57%) and covered the spread at a 54.4% rate.
It is even more valuable later in the season.
Since 2015, teams with a three or more day rest advantage from Week 13 onward have won 55.2% of their games and have covered the spread in 55.7% of games over a 106-game sample.
This is despite the betting lines at times being “adjusted” to account for these rest edges.
Understanding rest and prep advantages is a great way to find an edge both in NFL win totals and weekly game lines.