This is just a bad attempt at a Don Mattingly sig. It breaks every rule that I listed in my signature study. This ball is accompanied by a GAI Steve Sipe COA. This ball is listed by eBay seller dealaminute

http://www.ebay.com/itm/170844748473?ssPageName=STRK:MEWAX:IT&_...

Here is an authentic of this "style" the forger was trying to recreate to compare: