During his age 19 season in low A, Wisler had a K rate of 8.9 and 2.2. Toussaint so far this year is around 7 and 4 on K and walk rate.
Teheran at age 19 was 10.3 and 2.3 in his time in low A. That year he started in low A and ended up in AA.
Not saying Toussaint is chopped liver, but he is not an elite prospect. I have him rated as our second best pitching prospect and said his chances of making it as a major league starter are a little less than 50%. I have an appreciation for what a steep climb it is to being a middle of the rotation major league starter. Guys like Wood, Miller and Teheran were really really impressive coming up the minors.
Lulz on Toussaint not being a potentially elite prospect. DeGrom had a 7.8 K/9 as a 24-year-old in A ball. So?
Guys progress differently. Sometimes a guy has more middling stuff but great command, so his K rate is great in the lower minors but it decreases as he moves up. Other times, a guy has great stuff but for various reasons, his K rate is lower until he starts figuring things out as he gets older.
Toussaint is a potential top-end starter due to stuff, period. Suggesting anything less is stupid at this point. He's hardly even thrown his best pitch this year. It would not be a surprise at all if he comes out next year in A+ and has a K rate of 9 or better. But only then would he be a top prospect?
Also, I don't really get why people are so bullish on Herbert yet. What would justify him being above Dustin Peterson, or even Riley?