He worked a few (might have only been one) in December. So did John Moxley (I forget his WWE name).
You wont see guys get the call up right now, because it's WrestleMania season, so that is where all of the focus lies, so the roster goes into a holding pattern.
After WrestleMania, you get the draft (which is goofy because everyone works both shows anyway), and then they usually do a 'spring cleaning' where they cut some of the fat from the undercard. That's when you'll see new guys called up and put into the mix.
From what I read Triple H doesnt want anybody called up anymore without a framework in place of an initial storyline and direction. From what I understand, they love Moxley, and they think Black is ready in terms of ring work but will struggle with charisma and promos. I'm guessing he'll be another Justin Gabriel type who works the B-shows and does jobs on the main shows. His ROH promos were cringe worthy, and exposed why Gabe kept him quiet and never went all the way with him.