In 11 AAA starts and 10 major league starts we see the following:
Walk rate of 5.2 per nine innings in AAA and 5.5 in the majors
Strikeout rate of 11.6 in AAA and 9.4 in the majors
HR/fly ball rate of 6.7% in AAA and 11.5% in the majors
His major league numbers are pretty much in line with his AAA numbers once you make the standard adjustment.
BABIP of .304 in AAA and .303 in the majors. Luck has not been a factor in his performance at either level.
Strand rate of 75% in AAA and 74% in the majors. Sequencing luck or "clutchness" has not been a factor either.
He has about a 40% chance imo of developing into an effective major league starter. Folty is often held up as an example of what he could be. Folty has made good progress this year, but he isn't "there" yet. He is on track for less than 2 WAR this year. I think we need a rotation of 2 WAR pitchers with one or two at 3 WAR or better.