Everyone’s kid is going to have a different track record.
Freshman year my son was 5’11” 135. He cruised 80 and maxed 82/83.
Soph year he was 6’ 160. He cruised 83, hit 85/86.
Junior year he was 6’1” 170. He cruised 87/88 and hit 90.
Separated should surgery held him back senior year. He was 6’1” 175. After recovery he was back to 87/88 and 90.
He got to 6’2” 190 in college.He threw mid 90’s from the outfield.
My son is built like a point guard. He was never going to be a 200-220 build kid. But he worked hard at getting bigger, faster quicker and stronger.