The original 'Killer B's' was Bagwell, Biggio, and David Bell. For a couple years you could add Sean Berry.
'Baby Braves' was attached to the crop of rookies called up and leading the Braves to their 14th Division title in 2005, lead by Jeff Francouer and Brian McCann.
'Blake Street Bombers' was associated with the early Colorado Rockies teams, most notably in 1995. This was lead by Andres Gallaragga, Vinnie Castilla, Dante Bichette, and Larry Walker.