TheGreek uses 20 cent lines for baseball.
Here are a few books/exchanges you might want to checkout for your bases action.
Matchbook is a must if to have if you for baseball. They offer pretty good liquidity for the most part accept day games sometimes.
5Dimes would be a good one to use if you take advantage of their overnight reduce juice lines.
ABCIslands offers a dime line up to -190. However, the withdraw prices on their checks are rather pricey ($80 max. with a $2500 weekly cap)
Tradesports is an exchange you might want to check out. The offer a 4% commission which is pretty good IMO.