Arbusers

Are there diferent rules that aply for uver/under market by diferent bookies in baseball? Exactly over/under 7.5?Can I play this arb? I dont know anything about baseball!

It think a possible problem is if the match is not finished. Some bookies maintain over/under bets after 5 innings (i.e. Marathon) and other void them unless the match reaches 9 innings (Pinnacle). This also depends if it's a MLB match or other league.
Another risk is regarding initial pitchers. Some books require two listed pitchers start the game and will void bets if one does not start. Other books do not take into account initial pitchers.
A third difficulty is that sometimes the same teams play on consecutive days and you can be betting on different matches between the same teams in very near dates.
Good luck