Not sure about Baseball, But was at Las Vegas 9 days ago and wanted to play a certain NBA game with the under.
I first went to El Cortez told the clerk I want to wager $700 on the under total in the Phoenix/Minnesota game. He just laugh when I was about to hand him the money. He was cool though told me to wait first said most likely I would get approved but he had to call the Manager first over the phone to get approval which I did end up getting approved.
I then headed to the Golden Nugget told the clerk the same shit $700 on the under total he gave me major attitude "SIR, THE MAX WAGER HERE IS $550 to WIN $500. So I placed the bet then walked over to the Plaza tried to get down $600 and was approved there but the clerk had to call in first to see if their was a limit to that game which their was but didn't asked how much was the limit.
I don't hardly travel much to Vegas but that was my experience for NBA.
Also I forgot to add over at the Hilton for the over and under regular season win totals for the NBA I wanted to play a lot of money on the Lakers to go over the win total of 54 1/2 wins. The limit for me to place that bet was $1,100 to win $1,000.