Interesting, I wasn't aware of that. I think he will be just fine but it may take some time to getting used to the pace of the game. I'm not sure he saw many pitchers in the minors throwing 98-99 heaters with a 90-91 changeup.
Unless... there was a need to limit innings or ease someone back after an extended injury. It wouldn't be the first time starting pitchers were added to the bullpen.