Sports betting is almost universally illegal in the United States, except in Nevada, Oregon, Montana and Delaware. Nevada is the state with the loosest regulations in terms of sports betting, but Delaware stepped into the ring last year when it offered parlay and teaser betting on NFL games.

Delaware Gov. Jack Markell, a big proponent of sports betting, appealed to the U.S. Supreme Court to allow his state to expand the practice. Not surprisingly, the Supreme Court rejected his appeal.

From Business Week:

The rebuff means Delaware can offer only one aspect of its new sports-wagering plan: so-called parlay betting involving at least three NFL games. Markell had sought to offer single-game betting as well as wagering on other sports.

The high court rejection is a victory for the NFL, the National Basketball Association, Major League Baseball, the National Hockey League and the National Collegiate Athletic Association. They sued to block the Delaware plan and urged the Supreme Court not to hear the governorís appeal.