The last two seasons in the minors the majority of his innings have been at 2B or 3B. Based on his performance and what others have said, I would assume average.
https://www.baseball-reference.com/register/player.fcgi?id=prieto000ces
He has put together an impressive season at the plate thus far at Bowie. It will be interesting to see his adjustment at AAA once they remedy that logjam.