The main betting option for boxing is moneyline wagering – betting on who you think will win the bout - with the moneyline price on that fighter determining how much you could win on your bet.
For example, Fighter A is a -165 favorite against Fighter B, who is a +145 underdog. For every $1 you want to win with a wager on Fighter A, you must bet $1.65. A bet on Fighter B will return $1.45 for every $1 wagered. In order to win $100 with a bet on Fighter A, you would have to wager $165 while you could win $145 with a $100 bet on Fighter B.
Boxing events also offer total or Over/Under bets on the number of rounds a bout will go, with bettors taking either the Over or the Under. For example, a fight has a total of 9.5 rounds with the Over priced at -130 and the Under at EVEN money. That means in order to win a bet on the Over, the fight must go at least 10 rounds and to win a bet on the Under the fight can go no more than nine rounds.
There are other alternative wagers for boxing, such as method of victory (knockout, DQ or decision), round of victory, as well as fight and fighter props.