Jose Quintana picked-off Robinson Cano yesterday, but Yahoo! isn't crediting Quintana for the play.
Hey LB, I've seen this question a few times, and you can find a full explination in our Pickoffs and Caught Stealing article.
The quick way to tell, is to check the profile of the runner and see if a Caught Stealing was charged to him for that game.
The long way is to check the full play by play and read through the play in question. I've linked it below:
I hope this helps!