Yep, and considering that he is Rule 5 eligible again this off-season, it would help to know how his stuff plays in short relief (with the AAA/MLB ball) before either adding him to the 40-man roster or risking losing him.
Prior to this season, I had him in the second tier of potential 40-man roster adds, but he has leapfrogged past guys like Sedlock, Fenter, Adam Hall, and Mason McCoy
They've been using Peralta as a starter most of the year and may continue to do so, but I think his future will end up in the pen. they need to find out whether he can pitch on back to back days if needed where he could bring his upper 90s heat. He could be a Tate replacement.