Clue is in the name, but this online sportsbook is affiliated with the eponymous Fox Sports network.
Betfred is another British bookmaker that started in 1967 - funded by winnings that the founders made by backing England to win the 1966 football World Cup. The digital platform launched in 2004.
Named after the original bricks-and-mortar casino built in an old Philadelphia sugar refinery, the SugarHouse mobile app began offering online sports betting in New Jersey since late 2018. The operator is from the same Rush Street Gaming stable as Bet Rivers.
Bet Rivers is an alternative online sports betting offering from Rush Street Gaming, owners of the physical Rivers Casino Pittsburgh and the Rivers Casino Philadelphia (previously the SugarHouse). Both apps are active in their native Pennsylvania, but operate in different states beyond that.
Unibet launched its first online betting service back in 1999, but has had a presence in the US market since mid-November 2019, first going live in Pennsylvania.
FanDuel also began as a fantasy sports competition operator. In 2018 it was acquired by Irish bookmaker Paddy Power Betfair, and within days opened its first retail sports betting outlet at New Jersey's Meadowlands Racetrack.
The Parx Casino now has a sportsbook, and you can bet either via the online mobile app or in person at the largest casino in Pennsylvania.
BetMGM is a subsidiary of MGM Resorts International, the hospitality and entertainment giant. BetMGM has official partnerships with the NBA, NHL and MLB, as well as exclusive betting partnerships with numerous NFL teams.
DraftKings started life as a daily fantasy sports (DFS) operator, launching DraftKings Sportsbook in New Jersey on August 1, 2018 - making it the first company to offer legal, online, mobile sports betting services. DraftKings also offers retail sports betting in partnership with casinos throughout the US.