Sportsbook
BetRivers was a leg in 6,902 arbs, 4.0% of every arb we logged in four weeks
BetRivers is Rush Street Interactive's sportsbook, and it runs Delaware's state online sportsbook too.
Each state has its own BetRivers site; our desks link the right one for your state.
By Dynatyze Research · Updated Oct 29, 2026 · Run by Rush Street Interactive
The numbers
- Arbs with this book
- 6,9024.0% of 174,085 arbs · Sep 30, 2026 to Oct 27, 2026
- Median arb life
- 2 min 42 smedian locked return 1.40%
Arbs with BetRivers
Arbs6,902 with BetRivers as one leg, 4.0% of all 174,085
Median return1.40% locked, before limits and voids
Median life2 min 42 s from the first scan that saw it to the last
Most commonNBA spread (1,125), NBA total (763), NFL spread (731)
Middles20,878 of 308,430
Low holds2,570 of 33,394
SportsMLB, NBA, NFL, college football
WindowArbs first seen Sep 30, 2026 to Oct 27, 2026, since ended
Where it takes bets
- AZ
- CO
- DE
- IA
- IL
- IN
- LA
- MD
- MI
- NJ
- NY
- OH
- PA
- VA
- WV
States we could confirm; it may take bets in others, read Oct 15, 2026. Laws and launches change, so check the book's own site before you sign up.
Where it shows up on Dynatyze
Other books, measured the same way
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- SportsbookFanDuelFanDuel Sportsbook is run by Flutter Entertainment and is one of the two largest legal sportsbooks in the United States.
- SportsbookBetMGMBetMGM is the online sportsbook of MGM Resorts and Entain, a joint venture.
- SportsbookCaesars SportsbookCaesars Sportsbook is the online book of Caesars Entertainment, built on the William Hill US business it bought in 2021.
- SportsbooktheScore BettheScore Bet is PENN Entertainment's sportsbook. It was called ESPN BET until Dec 1, 2025; same operator, same prices, new name.
- SportsbookFanatics SportsbookFanatics Sportsbook is run by Fanatics Betting and Gaming, part of the Fanatics sports merchandise company.