Originally Posted by
Aahz
Jason has also got training by teachers Talia got for him, and was on top of this sofar the only Human that got ever trained by the All Caste.
I doubt that, the timinline is here of course a little bit screwed up because we are mixing here pre and post flash point, but Damian doesn't met Batman untill after Under the Red Hood, and Jason had several Years of training before that, so he was definitely out of the Ground way before Damian started his Year of Blood.
And Jason was of course in the field as Robin before, and did some stuff during his training and as part of the All Caste.
In the current continuity we know at least fought some kind of Monster for the All Caste and was active in Hongkong before Under the Red Hood.
That's probably true for all Batfamily members.