Edited to add: Yes, in my OPINION, this is a forgery.
Unless someone who has more expertise on Ruth autographs than me, says anything to the contrary, and as of February, 6, 2015 at 7:28 a.m. Pacific, no such person had even participated in this thread, my opinion will continue to be that it is a forgery.
The original post follows.
...now these ebay creeps are throwing out Kevin Keating's name as certifying their forgeries:
ebay Ruth ball forgery