Budworth is correct about the Forecaster, the stats they provide there are light years ahead of traditional baseball statistics. Their website is also great, I use it as a primary capping source. Prospectus is a great product, although it has a wider range of baseball topics it covers, so it is not as user friendly as Forecaster for pure capping. Still, I pick up both books every year and subscribe to both web sites. These sites and books provide you with much better statistical analysis, which simplifies your handicapping.
Baseball bettors have a unique opportunity right now to take advantage of the superior statistical innovations being made in the sport. The overwhelming majority will continue to handicap using stats like ERA and Batting Avg.; those who take advantage of the new statistical advancements will have a leg up on virtually everyone else. BTW, I hate math, you don't need to be able to do the calculations to harness the power of the information provided.
My 2 cents