It seems like the NFL has much sharper lines than any other sport out there and that you can make a lot of money betting on football with underdog teasers
hell, just look at last week
Saints +5.5 Dogs - Any Teaser is Succesful
Bears + 1 dogs - Any Teaser is Succesful
Bengals +3 Dogs - Any Teaser is Succesful
Bills Dogs (don't remember how much) - Any Teaser is Succesful
Titans + 1 dogs - Any Teaser is Succesful
Bucs +3 dogs - Any Teaser is Succesful
Same thing is true with Carolina, Minnesota, Washington, Dallas and Oakland
the only games where teasers on the dog wouldn't have been succesful was Miami, Pittsburg, Seattle, Indy and StLouis
so teasers would have been succesful on 11 of 16 games and a lot of the failed ones were obvious blowout situations (Seattle always gets blown out on the road, Miami always gets blown out by the pats, Indy is atrocious without peyton, etc...). The only really good teaser play that ended up being a failure was the steelers game