Thanks for all the input guys. Some interesting points. His curve ball is very difficult for hitters to pick up and in fact he has never had a hard hit off of it in the time he has been in high school. Rising senior this year. The pitch has little hump and his catcher has stated that he has trouble picking it up even when he knows it is coming. Arm speed on the curve has consistently been rated as "good" at camps. He actually had used it as part of 4 ks just before he and the coach spoke.
Stats, I was there for the conversation.
I don't doubt the correctness of the coach's advice. I guess I was just surprised I hadn't picked that up before.
His plan is to maintain the slow 12-6 curve and add a faster more 1-7 break pitch. I see a lot of 18-20 mph differential among some major league pitchers but they also usually have a hard slider too.
I recently spoke with a D1 commit that said his coach wanted his curve at a solid 77-78mph. His fastball runs about 88 tops.
Thanks,
Ted