Visa and Mastercard are the most universally accepted credit cards at betting sites, popular credit cards like Discover and American Express are accepted at multiple sportsbooks as well.

Mastercard is not accepted at certain stores and merchants that only take cash, such as vendors at a local fair. Mastercard is also not accepted at retail chains that have an exclusive agreement with another card network. For example, Costco accepts Mastercard only for online purchases.

The runline is baseball's version of the point spread. When betting on the runline, the favorite is -1.5 runs on the spread, with the underdog at +1.5 runs. Betting on the favorite requires your team to win its game by two or more runs.

What does the run line mean in baseball betting? In baseball betting, the run line is a 1.5-run spread set between two teams. The run line favorite must win by two or more runs to win the run line bet, while the underdog has to lose by less than two or win the game outright to win the run line bet.