Vintage Wool and Felt Baseball Caps

I just found a collection of vintage Baseball equipment there are several wool and felt caps in the lot. All these are wool except for the black cap with the red visor, this one is felt. Can anyone ID the teams of the two that have the "B's" on the front. Also what era these might be from. The blue and grey cap with the "B" on it has a very short visor compared to the others. They might be minor league or College teams, they come from the New England area. Thanks,Bill