The MLB Family is a small family, though they have grown considerably in the past couple years. Prior to Dani, the MLB family line included almost no twins for a large number of pledge classes back. More recently, there have been multiple sets of twins growing the family slightly.
The MLB family used to be known as the Jersey family, but the origins of MLB is unknown to current members (however, it does NOT stand for Major League Baseball like one might assume!). MLB is very proud of their family colors (bright blue & zebra print!)
Fun fact: At activation, new members of the MLB family are given a crazy outfit, including feather boas, leis, huge sunglasses and pompoms, and Bigs add an additional component for each new Little.