2013 Unleashed

What exactly does this mean? It says 8 "fluke" cards removed. Does this simply mean that 8 cards from the 2013 set are outperforming their value to a degree that it makes those cards flukes?

On a related note what would those 8 cards be?

Thanks.

The following 8 player cards appear ONLY in the 2013 "unleashed" set ("2013u"):

BATTERS
- Xander Bogaerts
- Francisco Cervelli
- Darnell McDonald
- Tommy Medica
- Miguel Olivo
- Josmil Pinto

PITCHERS
- Brandon Cumpton
- Tanner Roark

There is a description of the idea behind the "unleashed" set (with the extra "extreme" cards), here:

http://somonline.wikia.com/wiki/Fluke_cards

You can choose the use the "unleashed" set by clicking on the round click box below, and to the right of, the green strat 2013 logo on the screen for setting up a new team. If you don't want unleashed, you click on the click box to the left of the logo.