Although I personally hate this particular formation, the Cabrera would be considered exceptional by most. He must have signed this early on in a private signing. I would say this particular signature is exemplary.
As an aside, this is also fairly recent (2013 or 2014), as you can tell he's finally gotten fully comfortable with signing baseballs. A triple crown does wonders for an athlete's ability to sign odd shaped items. :P
I like the Rivera.