Article written last year (2007)
Over the past five seasons, NFL home teams in Week 1 are just 31-42-7 ATS (42 percent). This of course implies that roadies are a 58 percent winning proposition during this time. The public at large has a tendency to overvalue home teams and this is especially true in Week 1 when there is no current season data to make predictions from. Consequently, the oddsmakers almost surely shade the home teams, by and large making road teams the choice for the value player. Conclusion: Look long and hard at road teams first when handicapping the opening week.
Price ranges
Favorites are just 31-42-7 ATS (42 percent) in the opening week over the past five NFL seasons (Coincidentally, home teams hold the same ATS record as noted above). This means that underdogs bark at a 58 percent clip. Mid-range favorites performed the worst among our specified price ranges. In particular, favorites priced between –3 1/2 and –6 1/2 are only 8-15 ATS (35 percent) during this time.
The same basic pattern holds true when looking at home favorites (road favorites gravitate towards a 50 percent mean). Home favorites indeed are just 21-32-3 ATS (40 percent) in the first week of NFL action since 1999. Again, mid-range favorites are similarly the poorest performers when we look at home teams. Consider that home teams priced between –3 1/2 and –6 1/2 have stumbled to a 6-13 ATS (32 percent) mark in Week 1 games the past five seasons. Conclusion: Like home teams, favorites and particularly mid-range favorites are generally overvalued in Week 1.
Playoff teams
It might surprise you to learn that playoff teams from the prior year versus non-playoff teams from the prior year are a mere 16-23-3 (41 percent) ATS in NFL Week 1 games over the past five seasons. Home teams which made the playoffs versus teams which did not make the playoffs from the prior season drop to a meager 7-14-1 ATS (33 percent) during this time.
Why are playoff teams, and in particular those at home, such bad bets the past five openers? Just as the case with home teams and with favorites, oddsmakers intentionally overprice playoff teams in the opening week to compensate for the public’s propensity to over bet them.
This theory holds true just looking at straight-up records from the past season as well. That is, home teams with winning records from the prior season vs. road teams with losing records from the prior season are just 8-13 ATS in Week 1 NFL games since 1999. Conclusion: Playoff teams from the prior year and in particular, home playoff teams, are overvalued in Week 1 NFL games.