If a kid gets to 92-93 by the time the NLI signing period comes around a big program coach is going to find space for him. Chances are a kid throwing 88-89 is going to have until after post soph summer or junior year to make a decision.
If this is all about throwing 92-93 and getting drafted it doesn't matter when the kid gets there. Not every pitching prospect (top ten rounds) plays at a ranked program. A friend's son played at a D3. He was at 84 in high school. He was drafted because he threw 93 his senior year of college.
My apologies if this is crude. But the joke is appropriate to the situation.
A young bull and old bull were standing at the top of the hill. They looked down and saw a herd of heifers. The young bull suggested they run down there as fast as they can and each grab themselves a heifer. The old bull calmly suggested they walk down, size up the situation and have as many options as they can handle.