Definition
The dog (underdog) is the team or player expected to lose a matchup. Dogs are indicated by positive moneyline odds (+150, +300, etc.) or receiving points on the spread (+3, +7). Betting the dog means backing the less-favored side.
Example
Jets are +7 underdogs against the Bills. The Jets are 'the dog.' If you bet Jets +7, you win if the Jets win outright or lose by 6 or fewer points.
Common Questions
Are underdogs profitable to bet?
Are underdogs profitable to bet?
Historically, underdogs have been slightly more profitable than favorites because the public over-bets favorites. But the edge is small and varies by sport—value matters more than position.
What's a live dog?
What's a live dog?
A live dog is an underdog with a real chance to win. This contrasts with a team that's clearly outmatched. Sharp bettors look for live dogs where the market underestimates their chances.